diff --git a/your-code/pandas_1.ipynb b/your-code/pandas_1.ipynb
index 4f428ac..6706bab 100644
--- a/your-code/pandas_1.ipynb
+++ b/your-code/pandas_1.ipynb
@@ -35,7 +35,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 2,
+   "execution_count": 3,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -44,10 +44,31 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 4,
    "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "0     5.7\n",
+      "1    75.2\n",
+      "2    74.4\n",
+      "3    84.0\n",
+      "4    66.5\n",
+      "5    66.3\n",
+      "6    55.8\n",
+      "7    75.7\n",
+      "8    29.1\n",
+      "9    43.7\n",
+      "dtype: float64\n"
+     ]
+    }
+   ],
+   "source": [
+    "x = pd.Series(lst)\n",
+    "print(x)"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -60,10 +81,20 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 7,
    "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "74.4\n"
+     ]
+    }
+   ],
+   "source": [
+    "print(x[2])"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -74,7 +105,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 3,
+   "execution_count": 9,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -92,10 +123,145 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 10,
    "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "data": {
+      "text/html": [
+       "<div>\n",
+       "<style scoped>\n",
+       "    .dataframe tbody tr th:only-of-type {\n",
+       "        vertical-align: middle;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe tbody tr th {\n",
+       "        vertical-align: top;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe thead th {\n",
+       "        text-align: right;\n",
+       "    }\n",
+       "</style>\n",
+       "<table border=\"1\" class=\"dataframe\">\n",
+       "  <thead>\n",
+       "    <tr style=\"text-align: right;\">\n",
+       "      <th></th>\n",
+       "      <th>0</th>\n",
+       "      <th>1</th>\n",
+       "      <th>2</th>\n",
+       "      <th>3</th>\n",
+       "      <th>4</th>\n",
+       "    </tr>\n",
+       "  </thead>\n",
+       "  <tbody>\n",
+       "    <tr>\n",
+       "      <th>0</th>\n",
+       "      <td>53.1</td>\n",
+       "      <td>95.0</td>\n",
+       "      <td>67.5</td>\n",
+       "      <td>35.0</td>\n",
+       "      <td>78.4</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>1</th>\n",
+       "      <td>61.3</td>\n",
+       "      <td>40.8</td>\n",
+       "      <td>30.8</td>\n",
+       "      <td>37.8</td>\n",
+       "      <td>87.6</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>2</th>\n",
+       "      <td>20.6</td>\n",
+       "      <td>73.2</td>\n",
+       "      <td>44.2</td>\n",
+       "      <td>14.6</td>\n",
+       "      <td>91.8</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>3</th>\n",
+       "      <td>57.4</td>\n",
+       "      <td>0.1</td>\n",
+       "      <td>96.1</td>\n",
+       "      <td>4.2</td>\n",
+       "      <td>69.5</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>4</th>\n",
+       "      <td>83.6</td>\n",
+       "      <td>20.5</td>\n",
+       "      <td>85.4</td>\n",
+       "      <td>22.8</td>\n",
+       "      <td>35.9</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>5</th>\n",
+       "      <td>49.0</td>\n",
+       "      <td>69.0</td>\n",
+       "      <td>0.1</td>\n",
+       "      <td>31.8</td>\n",
+       "      <td>89.1</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>6</th>\n",
+       "      <td>23.3</td>\n",
+       "      <td>40.7</td>\n",
+       "      <td>95.0</td>\n",
+       "      <td>83.8</td>\n",
+       "      <td>26.9</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>7</th>\n",
+       "      <td>27.6</td>\n",
+       "      <td>26.4</td>\n",
+       "      <td>53.8</td>\n",
+       "      <td>88.8</td>\n",
+       "      <td>68.5</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>8</th>\n",
+       "      <td>96.6</td>\n",
+       "      <td>96.4</td>\n",
+       "      <td>53.4</td>\n",
+       "      <td>72.4</td>\n",
+       "      <td>50.1</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>9</th>\n",
+       "      <td>73.7</td>\n",
+       "      <td>39.0</td>\n",
+       "      <td>43.2</td>\n",
+       "      <td>81.6</td>\n",
+       "      <td>34.7</td>\n",
+       "    </tr>\n",
+       "  </tbody>\n",
+       "</table>\n",
+       "</div>"
+      ],
+      "text/plain": [
+       "      0     1     2     3     4\n",
+       "0  53.1  95.0  67.5  35.0  78.4\n",
+       "1  61.3  40.8  30.8  37.8  87.6\n",
+       "2  20.6  73.2  44.2  14.6  91.8\n",
+       "3  57.4   0.1  96.1   4.2  69.5\n",
+       "4  83.6  20.5  85.4  22.8  35.9\n",
+       "5  49.0  69.0   0.1  31.8  89.1\n",
+       "6  23.3  40.7  95.0  83.8  26.9\n",
+       "7  27.6  26.4  53.8  88.8  68.5\n",
+       "8  96.6  96.4  53.4  72.4  50.1\n",
+       "9  73.7  39.0  43.2  81.6  34.7"
+      ]
+     },
+     "execution_count": 10,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "df = pd.DataFrame(b)\n",
+    "df"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -106,7 +272,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 4,
+   "execution_count": 11,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -124,7 +290,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 5,
+   "execution_count": 12,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -133,10 +299,33 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 19,
    "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "   Score_1  Score_2  Score_3  Score_4  Score_5\n",
+      "0     53.1     95.0     67.5     35.0     78.4\n",
+      "1     61.3     40.8     30.8     37.8     87.6\n",
+      "2     20.6     73.2     44.2     14.6     91.8\n",
+      "3     57.4      0.1     96.1      4.2     69.5\n",
+      "4     83.6     20.5     85.4     22.8     35.9\n",
+      "5     49.0     69.0      0.1     31.8     89.1\n",
+      "6     23.3     40.7     95.0     83.8     26.9\n",
+      "7     27.6     26.4     53.8     88.8     68.5\n",
+      "8     96.6     96.4     53.4     72.4     50.1\n",
+      "9     73.7     39.0     43.2     81.6     34.7\n"
+     ]
+    }
+   ],
+   "source": [
+    "#b.columns = colnames\n",
+    "#df = pd.DataFrame(b)\n",
+    "df.columns = colnames\n",
+    "print (df)"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -147,10 +336,31 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 23,
    "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "   Score_1  Score_3  Score_5\n",
+      "0     53.1     67.5     78.4\n",
+      "1     61.3     30.8     87.6\n",
+      "2     20.6     44.2     91.8\n",
+      "3     57.4     96.1     69.5\n",
+      "4     83.6     85.4     35.9\n",
+      "5     49.0      0.1     89.1\n",
+      "6     23.3     95.0     26.9\n",
+      "7     27.6     53.8     68.5\n",
+      "8     96.6     53.4     50.1\n",
+      "9     73.7     43.2     34.7\n"
+     ]
+    }
+   ],
+   "source": [
+    "subset = df[[\"Score_1\", \"Score_3\", \"Score_5\"]]\n",
+    "print(subset)"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -161,10 +371,21 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 26,
    "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "56.95000000000001\n"
+     ]
+    }
+   ],
+   "source": [
+    "#avarege_3 = df[\"Score_3\"].mean()\n",
+    "print(df[\"Score_3\"].mean())"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -175,10 +396,20 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 28,
    "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "96.1\n"
+     ]
+    }
+   ],
+   "source": [
+    "print(df[\"Score_3\"].max())"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -189,10 +420,20 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 30,
    "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "40.75\n"
+     ]
+    }
+   ],
+   "source": [
+    "print(df[\"Score_2\"].median())"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -203,7 +444,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 6,
+   "execution_count": 31,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -224,10 +465,134 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 33,
    "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "data": {
+      "text/html": [
+       "<div>\n",
+       "<style scoped>\n",
+       "    .dataframe tbody tr th:only-of-type {\n",
+       "        vertical-align: middle;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe tbody tr th {\n",
+       "        vertical-align: top;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe thead th {\n",
+       "        text-align: right;\n",
+       "    }\n",
+       "</style>\n",
+       "<table border=\"1\" class=\"dataframe\">\n",
+       "  <thead>\n",
+       "    <tr style=\"text-align: right;\">\n",
+       "      <th></th>\n",
+       "      <th>Description</th>\n",
+       "      <th>Quantity</th>\n",
+       "      <th>UnitPrice</th>\n",
+       "      <th>Revenue</th>\n",
+       "    </tr>\n",
+       "  </thead>\n",
+       "  <tbody>\n",
+       "    <tr>\n",
+       "      <th>0</th>\n",
+       "      <td>LUNCH BAG APPLE DESIGN</td>\n",
+       "      <td>1</td>\n",
+       "      <td>1.65</td>\n",
+       "      <td>1.65</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>1</th>\n",
+       "      <td>SET OF 60 VINTAGE LEAF CAKE CASES</td>\n",
+       "      <td>24</td>\n",
+       "      <td>0.55</td>\n",
+       "      <td>13.20</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>2</th>\n",
+       "      <td>RIBBON REEL STRIPES DESIGN</td>\n",
+       "      <td>1</td>\n",
+       "      <td>1.65</td>\n",
+       "      <td>1.65</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>3</th>\n",
+       "      <td>WORLD WAR 2 GLIDERS ASSTD DESIGNS</td>\n",
+       "      <td>2880</td>\n",
+       "      <td>0.18</td>\n",
+       "      <td>518.40</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>4</th>\n",
+       "      <td>PLAYING CARDS JUBILEE UNION JACK</td>\n",
+       "      <td>2</td>\n",
+       "      <td>1.25</td>\n",
+       "      <td>2.50</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>5</th>\n",
+       "      <td>POPCORN HOLDER</td>\n",
+       "      <td>7</td>\n",
+       "      <td>0.85</td>\n",
+       "      <td>5.95</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>6</th>\n",
+       "      <td>BOX OF VINTAGE ALPHABET BLOCKS</td>\n",
+       "      <td>1</td>\n",
+       "      <td>11.95</td>\n",
+       "      <td>11.95</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>7</th>\n",
+       "      <td>PARTY BUNTING</td>\n",
+       "      <td>4</td>\n",
+       "      <td>4.95</td>\n",
+       "      <td>19.80</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>8</th>\n",
+       "      <td>JAZZ HEARTS ADDRESS BOOK</td>\n",
+       "      <td>10</td>\n",
+       "      <td>0.19</td>\n",
+       "      <td>1.90</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>9</th>\n",
+       "      <td>SET OF 4 SANTA PLACE SETTINGS</td>\n",
+       "      <td>48</td>\n",
+       "      <td>1.25</td>\n",
+       "      <td>60.00</td>\n",
+       "    </tr>\n",
+       "  </tbody>\n",
+       "</table>\n",
+       "</div>"
+      ],
+      "text/plain": [
+       "                          Description  Quantity  UnitPrice  Revenue\n",
+       "0              LUNCH BAG APPLE DESIGN         1       1.65     1.65\n",
+       "1  SET OF 60 VINTAGE LEAF CAKE CASES         24       0.55    13.20\n",
+       "2         RIBBON REEL STRIPES DESIGN          1       1.65     1.65\n",
+       "3   WORLD WAR 2 GLIDERS ASSTD DESIGNS      2880       0.18   518.40\n",
+       "4    PLAYING CARDS JUBILEE UNION JACK         2       1.25     2.50\n",
+       "5                      POPCORN HOLDER         7       0.85     5.95\n",
+       "6      BOX OF VINTAGE ALPHABET BLOCKS         1      11.95    11.95\n",
+       "7                       PARTY BUNTING         4       4.95    19.80\n",
+       "8            JAZZ HEARTS ADDRESS BOOK        10       0.19     1.90\n",
+       "9       SET OF 4 SANTA PLACE SETTINGS        48       1.25    60.00"
+      ]
+     },
+     "execution_count": 33,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "df = pd.DataFrame.from_dict(orders)\n",
+    "df"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -238,10 +603,22 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 36,
    "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Revenue:  637.0\n",
+      "Quantity:  2978\n"
+     ]
+    }
+   ],
+   "source": [
+    "print(\"Revenue: \", df.Revenue.sum())\n",
+    "print(\"Quantity: \", df.Quantity.sum())"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -252,10 +629,35 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 47,
    "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "                          Description  Quantity  UnitPrice  Revenue\n",
+      "6      BOX OF VINTAGE ALPHABET BLOCKS         1      11.95    11.95\n",
+      "7                       PARTY BUNTING         4       4.95    19.80\n",
+      "0              LUNCH BAG APPLE DESIGN         1       1.65     1.65\n",
+      "2         RIBBON REEL STRIPES DESIGN          1       1.65     1.65\n",
+      "4    PLAYING CARDS JUBILEE UNION JACK         2       1.25     2.50\n",
+      "9       SET OF 4 SANTA PLACE SETTINGS        48       1.25    60.00\n",
+      "5                      POPCORN HOLDER         7       0.85     5.95\n",
+      "1  SET OF 60 VINTAGE LEAF CAKE CASES         24       0.55    13.20\n",
+      "8            JAZZ HEARTS ADDRESS BOOK        10       0.19     1.90\n",
+      "3   WORLD WAR 2 GLIDERS ASSTD DESIGNS      2880       0.18   518.40\n",
+      "\n",
+      "Diferrence: 11.77 \n"
+     ]
+    }
+   ],
+   "source": [
+    "print(df.sort_values(by=\"UnitPrice\", ascending=False))\n",
+    "\n",
+    "difference = df[\"UnitPrice\"].max() - df[\"UnitPrice\"].min()\n",
+    "print(f\"\\nDiferrence: {difference} \")"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -266,7 +668,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 7,
+   "execution_count": 83,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -285,10 +687,237 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 57,
    "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "   Serial No.  GRE Score  TOEFL Score  University Rating  SOP  LOR  CGPA  \\\n",
+      "0           1        337          118                  4  4.5  4.5  9.65   \n",
+      "1           2        316          104                  3  3.0  3.5  8.00   \n",
+      "2           3        322          110                  3  3.5  2.5  8.67   \n",
+      "3           4        314          103                  2  2.0  3.0  8.21   \n",
+      "4           5        330          115                  5  4.5  3.0  9.34   \n",
+      "\n",
+      "   Research  Chance of Admit  \n",
+      "0         1             0.92  \n",
+      "1         1             0.72  \n",
+      "2         1             0.80  \n",
+      "3         0             0.65  \n",
+      "4         1             0.90  \n"
+     ]
+    },
+    {
+     "data": {
+      "text/html": [
+       "<div>\n",
+       "<style scoped>\n",
+       "    .dataframe tbody tr th:only-of-type {\n",
+       "        vertical-align: middle;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe tbody tr th {\n",
+       "        vertical-align: top;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe thead th {\n",
+       "        text-align: right;\n",
+       "    }\n",
+       "</style>\n",
+       "<table border=\"1\" class=\"dataframe\">\n",
+       "  <thead>\n",
+       "    <tr style=\"text-align: right;\">\n",
+       "      <th></th>\n",
+       "      <th>Serial No.</th>\n",
+       "      <th>GRE Score</th>\n",
+       "      <th>TOEFL Score</th>\n",
+       "      <th>University Rating</th>\n",
+       "      <th>SOP</th>\n",
+       "      <th>LOR</th>\n",
+       "      <th>CGPA</th>\n",
+       "      <th>Research</th>\n",
+       "      <th>Chance of Admit</th>\n",
+       "    </tr>\n",
+       "  </thead>\n",
+       "  <tbody>\n",
+       "    <tr>\n",
+       "      <th>0</th>\n",
+       "      <td>1</td>\n",
+       "      <td>337</td>\n",
+       "      <td>118</td>\n",
+       "      <td>4</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>9.65</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.92</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>1</th>\n",
+       "      <td>2</td>\n",
+       "      <td>316</td>\n",
+       "      <td>104</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>8.00</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.72</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>2</th>\n",
+       "      <td>3</td>\n",
+       "      <td>322</td>\n",
+       "      <td>110</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>2.5</td>\n",
+       "      <td>8.67</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.80</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>3</th>\n",
+       "      <td>4</td>\n",
+       "      <td>314</td>\n",
+       "      <td>103</td>\n",
+       "      <td>2</td>\n",
+       "      <td>2.0</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>8.21</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0.65</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>4</th>\n",
+       "      <td>5</td>\n",
+       "      <td>330</td>\n",
+       "      <td>115</td>\n",
+       "      <td>5</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>9.34</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.90</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>...</th>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>380</th>\n",
+       "      <td>381</td>\n",
+       "      <td>324</td>\n",
+       "      <td>110</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>9.04</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.82</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>381</th>\n",
+       "      <td>382</td>\n",
+       "      <td>325</td>\n",
+       "      <td>107</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>9.11</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.84</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>382</th>\n",
+       "      <td>383</td>\n",
+       "      <td>330</td>\n",
+       "      <td>116</td>\n",
+       "      <td>4</td>\n",
+       "      <td>5.0</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>9.45</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.91</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>383</th>\n",
+       "      <td>384</td>\n",
+       "      <td>312</td>\n",
+       "      <td>103</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>4.0</td>\n",
+       "      <td>8.78</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0.67</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>384</th>\n",
+       "      <td>385</td>\n",
+       "      <td>333</td>\n",
+       "      <td>117</td>\n",
+       "      <td>4</td>\n",
+       "      <td>5.0</td>\n",
+       "      <td>4.0</td>\n",
+       "      <td>9.66</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.95</td>\n",
+       "    </tr>\n",
+       "  </tbody>\n",
+       "</table>\n",
+       "<p>385 rows × 9 columns</p>\n",
+       "</div>"
+      ],
+      "text/plain": [
+       "     Serial No.  GRE Score  TOEFL Score  University Rating  SOP  LOR  CGPA  \\\n",
+       "0             1        337          118                  4  4.5  4.5  9.65   \n",
+       "1             2        316          104                  3  3.0  3.5  8.00   \n",
+       "2             3        322          110                  3  3.5  2.5  8.67   \n",
+       "3             4        314          103                  2  2.0  3.0  8.21   \n",
+       "4             5        330          115                  5  4.5  3.0  9.34   \n",
+       "..          ...        ...          ...                ...  ...  ...   ...   \n",
+       "380         381        324          110                  3  3.5  3.5  9.04   \n",
+       "381         382        325          107                  3  3.0  3.5  9.11   \n",
+       "382         383        330          116                  4  5.0  4.5  9.45   \n",
+       "383         384        312          103                  3  3.5  4.0  8.78   \n",
+       "384         385        333          117                  4  5.0  4.0  9.66   \n",
+       "\n",
+       "     Research  Chance of Admit  \n",
+       "0           1             0.92  \n",
+       "1           1             0.72  \n",
+       "2           1             0.80  \n",
+       "3           0             0.65  \n",
+       "4           1             0.90  \n",
+       "..        ...              ...  \n",
+       "380         1             0.82  \n",
+       "381         1             0.84  \n",
+       "382         1             0.91  \n",
+       "383         0             0.67  \n",
+       "384         1             0.95  \n",
+       "\n",
+       "[385 rows x 9 columns]"
+      ]
+     },
+     "execution_count": 57,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "print(admissions.head())\n",
+    "admissions"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -299,10 +928,218 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 84,
    "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "data": {
+      "text/html": [
+       "<div>\n",
+       "<style scoped>\n",
+       "    .dataframe tbody tr th:only-of-type {\n",
+       "        vertical-align: middle;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe tbody tr th {\n",
+       "        vertical-align: top;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe thead th {\n",
+       "        text-align: right;\n",
+       "    }\n",
+       "</style>\n",
+       "<table border=\"1\" class=\"dataframe\">\n",
+       "  <thead>\n",
+       "    <tr style=\"text-align: right;\">\n",
+       "      <th></th>\n",
+       "      <th>Serial No.</th>\n",
+       "      <th>GRE Score</th>\n",
+       "      <th>TOEFL Score</th>\n",
+       "      <th>University Rating</th>\n",
+       "      <th>SOP</th>\n",
+       "      <th>LOR</th>\n",
+       "      <th>CGPA</th>\n",
+       "      <th>Research</th>\n",
+       "      <th>Chance of Admit</th>\n",
+       "    </tr>\n",
+       "  </thead>\n",
+       "  <tbody>\n",
+       "    <tr>\n",
+       "      <th>0</th>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>1</th>\n",
+       "      <td>False</td>\n",
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+       "      <td>False</td>\n",
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+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>2</th>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>3</th>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>4</th>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>...</th>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>380</th>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>381</th>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>382</th>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>383</th>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>384</th>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "      <td>False</td>\n",
+       "    </tr>\n",
+       "  </tbody>\n",
+       "</table>\n",
+       "<p>385 rows × 9 columns</p>\n",
+       "</div>"
+      ],
+      "text/plain": [
+       "     Serial No.  GRE Score  TOEFL Score  University Rating    SOP    LOR  \\\n",
+       "0         False      False        False              False  False  False   \n",
+       "1         False      False        False              False  False  False   \n",
+       "2         False      False        False              False  False  False   \n",
+       "3         False      False        False              False  False  False   \n",
+       "4         False      False        False              False  False  False   \n",
+       "..          ...        ...          ...                ...    ...    ...   \n",
+       "380       False      False        False              False  False  False   \n",
+       "381       False      False        False              False  False  False   \n",
+       "382       False      False        False              False  False  False   \n",
+       "383       False      False        False              False  False  False   \n",
+       "384       False      False        False              False  False  False   \n",
+       "\n",
+       "      CGPA  Research  Chance of Admit  \n",
+       "0    False     False            False  \n",
+       "1    False     False            False  \n",
+       "2    False     False            False  \n",
+       "3    False     False            False  \n",
+       "4    False     False            False  \n",
+       "..     ...       ...              ...  \n",
+       "380  False     False            False  \n",
+       "381  False     False            False  \n",
+       "382  False     False            False  \n",
+       "383  False     False            False  \n",
+       "384  False     False            False  \n",
+       "\n",
+       "[385 rows x 9 columns]"
+      ]
+     },
+     "execution_count": 84,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "#print(admissions.isnull())\n",
+    "admissions.isnull()"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -313,17 +1150,231 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 91,
    "metadata": {},
-   "outputs": [],
-   "source": []
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "data": {
+      "text/html": [
+       "<div>\n",
+       "<style scoped>\n",
+       "    .dataframe tbody tr th:only-of-type {\n",
+       "        vertical-align: middle;\n",
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+       "\n",
+       "    .dataframe tbody tr th {\n",
+       "        vertical-align: top;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe thead th {\n",
+       "        text-align: right;\n",
+       "    }\n",
+       "</style>\n",
+       "<table border=\"1\" class=\"dataframe\">\n",
+       "  <thead>\n",
+       "    <tr style=\"text-align: right;\">\n",
+       "      <th></th>\n",
+       "      <th>Serial No.</th>\n",
+       "      <th>GRE Score</th>\n",
+       "      <th>TOEFL Score</th>\n",
+       "      <th>University Rating</th>\n",
+       "      <th>SOP</th>\n",
+       "      <th>LOR</th>\n",
+       "      <th>CGPA</th>\n",
+       "      <th>Research</th>\n",
+       "      <th>Chance of Admit</th>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>Serial No.</th>\n",
+       "      <th></th>\n",
+       "      <th></th>\n",
+       "      <th></th>\n",
+       "      <th></th>\n",
+       "      <th></th>\n",
+       "      <th></th>\n",
+       "      <th></th>\n",
+       "      <th></th>\n",
+       "      <th></th>\n",
+       "    </tr>\n",
+       "  </thead>\n",
+       "  <tbody>\n",
+       "    <tr>\n",
+       "      <th>1</th>\n",
+       "      <td>1</td>\n",
+       "      <td>337</td>\n",
+       "      <td>118</td>\n",
+       "      <td>4</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>9.65</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.92</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>2</th>\n",
+       "      <td>2</td>\n",
+       "      <td>316</td>\n",
+       "      <td>104</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>8.00</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.72</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>3</th>\n",
+       "      <td>3</td>\n",
+       "      <td>322</td>\n",
+       "      <td>110</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>2.5</td>\n",
+       "      <td>8.67</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.80</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>4</th>\n",
+       "      <td>4</td>\n",
+       "      <td>314</td>\n",
+       "      <td>103</td>\n",
+       "      <td>2</td>\n",
+       "      <td>2.0</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>8.21</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0.65</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>5</th>\n",
+       "      <td>5</td>\n",
+       "      <td>330</td>\n",
+       "      <td>115</td>\n",
+       "      <td>5</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>9.34</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.90</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>...</th>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>381</th>\n",
+       "      <td>381</td>\n",
+       "      <td>324</td>\n",
+       "      <td>110</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>9.04</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.82</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>382</th>\n",
+       "      <td>382</td>\n",
+       "      <td>325</td>\n",
+       "      <td>107</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>9.11</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.84</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>383</th>\n",
+       "      <td>383</td>\n",
+       "      <td>330</td>\n",
+       "      <td>116</td>\n",
+       "      <td>4</td>\n",
+       "      <td>5.0</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>9.45</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.91</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>384</th>\n",
+       "      <td>384</td>\n",
+       "      <td>312</td>\n",
+       "      <td>103</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>4.0</td>\n",
+       "      <td>8.78</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0.67</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>385</th>\n",
+       "      <td>385</td>\n",
+       "      <td>333</td>\n",
+       "      <td>117</td>\n",
+       "      <td>4</td>\n",
+       "      <td>5.0</td>\n",
+       "      <td>4.0</td>\n",
+       "      <td>9.66</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.95</td>\n",
+       "    </tr>\n",
+       "  </tbody>\n",
+       "</table>\n",
+       "<p>385 rows × 9 columns</p>\n",
+       "</div>"
+      ],
+      "text/plain": [
+       "            Serial No.  GRE Score  TOEFL Score  University Rating  SOP  LOR  \\\n",
+       "Serial No.                                                                    \n",
+       "1                    1        337          118                  4  4.5  4.5   \n",
+       "2                    2        316          104                  3  3.0  3.5   \n",
+       "3                    3        322          110                  3  3.5  2.5   \n",
+       "4                    4        314          103                  2  2.0  3.0   \n",
+       "5                    5        330          115                  5  4.5  3.0   \n",
+       "...                ...        ...          ...                ...  ...  ...   \n",
+       "381                381        324          110                  3  3.5  3.5   \n",
+       "382                382        325          107                  3  3.0  3.5   \n",
+       "383                383        330          116                  4  5.0  4.5   \n",
+       "384                384        312          103                  3  3.5  4.0   \n",
+       "385                385        333          117                  4  5.0  4.0   \n",
+       "\n",
+       "            CGPA  Research  Chance of Admit  \n",
+       "Serial No.                                   \n",
+       "1           9.65         1             0.92  \n",
+       "2           8.00         1             0.72  \n",
+       "3           8.67         1             0.80  \n",
+       "4           8.21         0             0.65  \n",
+       "5           9.34         1             0.90  \n",
+       "...          ...       ...              ...  \n",
+       "381         9.04         1             0.82  \n",
+       "382         9.11         1             0.84  \n",
+       "383         9.45         1             0.91  \n",
+       "384         8.78         0             0.67  \n",
+       "385         9.66         1             0.95  \n",
+       "\n",
+       "[385 rows x 9 columns]"
+      ]
+     },
+     "execution_count": 91,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "admissions.set_index([\"Serial No.\"], inplace=False, drop=False)\n"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -334,10 +1385,133 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 105,
    "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "49\n",
+      "168\n"
+     ]
+    },
+    {
+     "data": {
+      "text/html": [
+       "<div>\n",
+       "<style scoped>\n",
+       "    .dataframe tbody tr th:only-of-type {\n",
+       "        vertical-align: middle;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe tbody tr th {\n",
+       "        vertical-align: top;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe thead th {\n",
+       "        text-align: right;\n",
+       "    }\n",
+       "</style>\n",
+       "<table border=\"1\" class=\"dataframe\">\n",
+       "  <thead>\n",
+       "    <tr style=\"text-align: right;\">\n",
+       "      <th></th>\n",
+       "      <th>GRE Score</th>\n",
+       "      <th>CGPA</th>\n",
+       "    </tr>\n",
+       "  </thead>\n",
+       "  <tbody>\n",
+       "    <tr>\n",
+       "      <th>0</th>\n",
+       "      <td>337</td>\n",
+       "      <td>9.65</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>1</th>\n",
+       "      <td>316</td>\n",
+       "      <td>8.00</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>2</th>\n",
+       "      <td>322</td>\n",
+       "      <td>8.67</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>3</th>\n",
+       "      <td>314</td>\n",
+       "      <td>8.21</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>4</th>\n",
+       "      <td>330</td>\n",
+       "      <td>9.34</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>...</th>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>380</th>\n",
+       "      <td>324</td>\n",
+       "      <td>9.04</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>381</th>\n",
+       "      <td>325</td>\n",
+       "      <td>9.11</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>382</th>\n",
+       "      <td>330</td>\n",
+       "      <td>9.45</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>383</th>\n",
+       "      <td>312</td>\n",
+       "      <td>8.78</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>384</th>\n",
+       "      <td>333</td>\n",
+       "      <td>9.66</td>\n",
+       "    </tr>\n",
+       "  </tbody>\n",
+       "</table>\n",
+       "<p>385 rows × 2 columns</p>\n",
+       "</div>"
+      ],
+      "text/plain": [
+       "     GRE Score  CGPA\n",
+       "0          337  9.65\n",
+       "1          316  8.00\n",
+       "2          322  8.67\n",
+       "3          314  8.21\n",
+       "4          330  9.34\n",
+       "..         ...   ...\n",
+       "380        324  9.04\n",
+       "381        325  9.11\n",
+       "382        330  9.45\n",
+       "383        312  8.78\n",
+       "384        333  9.66\n",
+       "\n",
+       "[385 rows x 2 columns]"
+      ]
+     },
+     "execution_count": 105,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "print(admissions[\"GRE Score\"].nunique())\n",
+    "print(admissions[\"CGPA\"].nunique())\n",
+    "subset = admissions[[\"GRE Score\", \"CGPA\"]]\n",
+    "subset \n",
+    "\n",
+    "# it's not possible "
+   ]
   },
   {
    "cell_type": "markdown",
@@ -348,10 +1522,217 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 93,
    "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "data": {
+      "text/html": [
+       "<div>\n",
+       "<style scoped>\n",
+       "    .dataframe tbody tr th:only-of-type {\n",
+       "        vertical-align: middle;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe tbody tr th {\n",
+       "        vertical-align: top;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe thead th {\n",
+       "        text-align: right;\n",
+       "    }\n",
+       "</style>\n",
+       "<table border=\"1\" class=\"dataframe\">\n",
+       "  <thead>\n",
+       "    <tr style=\"text-align: right;\">\n",
+       "      <th></th>\n",
+       "      <th>Serial No.</th>\n",
+       "      <th>GRE Score</th>\n",
+       "      <th>TOEFL Score</th>\n",
+       "      <th>University Rating</th>\n",
+       "      <th>SOP</th>\n",
+       "      <th>LOR</th>\n",
+       "      <th>CGPA</th>\n",
+       "      <th>Research</th>\n",
+       "      <th>Chance of Admit</th>\n",
+       "    </tr>\n",
+       "  </thead>\n",
+       "  <tbody>\n",
+       "    <tr>\n",
+       "      <th>0</th>\n",
+       "      <td>1</td>\n",
+       "      <td>337</td>\n",
+       "      <td>118</td>\n",
+       "      <td>4</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>9.65</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.92</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>1</th>\n",
+       "      <td>2</td>\n",
+       "      <td>316</td>\n",
+       "      <td>104</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>8.00</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.72</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>2</th>\n",
+       "      <td>3</td>\n",
+       "      <td>322</td>\n",
+       "      <td>110</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>2.5</td>\n",
+       "      <td>8.67</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.80</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>3</th>\n",
+       "      <td>4</td>\n",
+       "      <td>314</td>\n",
+       "      <td>103</td>\n",
+       "      <td>2</td>\n",
+       "      <td>2.0</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>8.21</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0.65</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>4</th>\n",
+       "      <td>5</td>\n",
+       "      <td>330</td>\n",
+       "      <td>115</td>\n",
+       "      <td>5</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>9.34</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.90</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>...</th>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>380</th>\n",
+       "      <td>381</td>\n",
+       "      <td>324</td>\n",
+       "      <td>110</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>9.04</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.82</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>381</th>\n",
+       "      <td>382</td>\n",
+       "      <td>325</td>\n",
+       "      <td>107</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>9.11</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.84</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>382</th>\n",
+       "      <td>383</td>\n",
+       "      <td>330</td>\n",
+       "      <td>116</td>\n",
+       "      <td>4</td>\n",
+       "      <td>5.0</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>9.45</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.91</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>383</th>\n",
+       "      <td>384</td>\n",
+       "      <td>312</td>\n",
+       "      <td>103</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>4.0</td>\n",
+       "      <td>8.78</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0.67</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>384</th>\n",
+       "      <td>385</td>\n",
+       "      <td>333</td>\n",
+       "      <td>117</td>\n",
+       "      <td>4</td>\n",
+       "      <td>5.0</td>\n",
+       "      <td>4.0</td>\n",
+       "      <td>9.66</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.95</td>\n",
+       "    </tr>\n",
+       "  </tbody>\n",
+       "</table>\n",
+       "<p>385 rows × 9 columns</p>\n",
+       "</div>"
+      ],
+      "text/plain": [
+       "     Serial No.  GRE Score  TOEFL Score  University Rating  SOP  LOR  CGPA  \\\n",
+       "0             1        337          118                  4  4.5  4.5  9.65   \n",
+       "1             2        316          104                  3  3.0  3.5  8.00   \n",
+       "2             3        322          110                  3  3.5  2.5  8.67   \n",
+       "3             4        314          103                  2  2.0  3.0  8.21   \n",
+       "4             5        330          115                  5  4.5  3.0  9.34   \n",
+       "..          ...        ...          ...                ...  ...  ...   ...   \n",
+       "380         381        324          110                  3  3.5  3.5  9.04   \n",
+       "381         382        325          107                  3  3.0  3.5  9.11   \n",
+       "382         383        330          116                  4  5.0  4.5  9.45   \n",
+       "383         384        312          103                  3  3.5  4.0  8.78   \n",
+       "384         385        333          117                  4  5.0  4.0  9.66   \n",
+       "\n",
+       "     Research  Chance of Admit  \n",
+       "0           1             0.92  \n",
+       "1           1             0.72  \n",
+       "2           1             0.80  \n",
+       "3           0             0.65  \n",
+       "4           1             0.90  \n",
+       "..        ...              ...  \n",
+       "380         1             0.82  \n",
+       "381         1             0.84  \n",
+       "382         1             0.91  \n",
+       "383         0             0.67  \n",
+       "384         1             0.95  \n",
+       "\n",
+       "[385 rows x 9 columns]"
+      ]
+     },
+     "execution_count": 93,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "admissions[admissions[\"CGPA\"] > 9 & (admissions[\"Research\"] == 1)]"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -362,17 +1743,220 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 94,
    "metadata": {},
-   "outputs": [],
-   "source": []
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": []
+   "outputs": [
+    {
+     "data": {
+      "text/html": [
+       "<div>\n",
+       "<style scoped>\n",
+       "    .dataframe tbody tr th:only-of-type {\n",
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+       "\n",
+       "    .dataframe tbody tr th {\n",
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+       "\n",
+       "    .dataframe thead th {\n",
+       "        text-align: right;\n",
+       "    }\n",
+       "</style>\n",
+       "<table border=\"1\" class=\"dataframe\">\n",
+       "  <thead>\n",
+       "    <tr style=\"text-align: right;\">\n",
+       "      <th></th>\n",
+       "      <th>Serial No.</th>\n",
+       "      <th>GRE Score</th>\n",
+       "      <th>TOEFL Score</th>\n",
+       "      <th>University Rating</th>\n",
+       "      <th>SOP</th>\n",
+       "      <th>LOR</th>\n",
+       "      <th>CGPA</th>\n",
+       "      <th>Research</th>\n",
+       "      <th>Chance of Admit</th>\n",
+       "    </tr>\n",
+       "  </thead>\n",
+       "  <tbody>\n",
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+       "      <td>4.5</td>\n",
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+       "      <td>1</td>\n",
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+       "      <td>0.72</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>2</th>\n",
+       "      <td>3</td>\n",
+       "      <td>322</td>\n",
+       "      <td>110</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>2.5</td>\n",
+       "      <td>8.67</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.80</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>3</th>\n",
+       "      <td>4</td>\n",
+       "      <td>314</td>\n",
+       "      <td>103</td>\n",
+       "      <td>2</td>\n",
+       "      <td>2.0</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>8.21</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0.65</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>4</th>\n",
+       "      <td>5</td>\n",
+       "      <td>330</td>\n",
+       "      <td>115</td>\n",
+       "      <td>5</td>\n",
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+       "      <td>9.34</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.90</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>...</th>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
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+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>380</th>\n",
+       "      <td>381</td>\n",
+       "      <td>324</td>\n",
+       "      <td>110</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>9.04</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.82</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>381</th>\n",
+       "      <td>382</td>\n",
+       "      <td>325</td>\n",
+       "      <td>107</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>9.11</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.84</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>382</th>\n",
+       "      <td>383</td>\n",
+       "      <td>330</td>\n",
+       "      <td>116</td>\n",
+       "      <td>4</td>\n",
+       "      <td>5.0</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>9.45</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.91</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>383</th>\n",
+       "      <td>384</td>\n",
+       "      <td>312</td>\n",
+       "      <td>103</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>4.0</td>\n",
+       "      <td>8.78</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0.67</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>384</th>\n",
+       "      <td>385</td>\n",
+       "      <td>333</td>\n",
+       "      <td>117</td>\n",
+       "      <td>4</td>\n",
+       "      <td>5.0</td>\n",
+       "      <td>4.0</td>\n",
+       "      <td>9.66</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.95</td>\n",
+       "    </tr>\n",
+       "  </tbody>\n",
+       "</table>\n",
+       "<p>385 rows × 9 columns</p>\n",
+       "</div>"
+      ],
+      "text/plain": [
+       "     Serial No.  GRE Score  TOEFL Score  University Rating  SOP  LOR  CGPA  \\\n",
+       "0             1        337          118                  4  4.5  4.5  9.65   \n",
+       "1             2        316          104                  3  3.0  3.5  8.00   \n",
+       "2             3        322          110                  3  3.5  2.5  8.67   \n",
+       "3             4        314          103                  2  2.0  3.0  8.21   \n",
+       "4             5        330          115                  5  4.5  3.0  9.34   \n",
+       "..          ...        ...          ...                ...  ...  ...   ...   \n",
+       "380         381        324          110                  3  3.5  3.5  9.04   \n",
+       "381         382        325          107                  3  3.0  3.5  9.11   \n",
+       "382         383        330          116                  4  5.0  4.5  9.45   \n",
+       "383         384        312          103                  3  3.5  4.0  8.78   \n",
+       "384         385        333          117                  4  5.0  4.0  9.66   \n",
+       "\n",
+       "     Research  Chance of Admit  \n",
+       "0           1             0.92  \n",
+       "1           1             0.72  \n",
+       "2           1             0.80  \n",
+       "3           0             0.65  \n",
+       "4           1             0.90  \n",
+       "..        ...              ...  \n",
+       "380         1             0.82  \n",
+       "381         1             0.84  \n",
+       "382         1             0.91  \n",
+       "383         0             0.67  \n",
+       "384         1             0.95  \n",
+       "\n",
+       "[385 rows x 9 columns]"
+      ]
+     },
+     "execution_count": 94,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "#a = (admissions.loc[(admissions[\"CGPA\"] > 9)]) & (admissions.loc[(admissions[\"SOP\"] < 3.5)])\n",
+    "#print(a)\n",
+    "\n",
+    "admissions[admissions[\"CGPA\"] > 9 & (admissions[\"SOP\"] < 3.5)]"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -449,7 +2033,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.10.8"
+   "version": "3.12.0"
   },
   "toc": {
    "base_numbering": "",