diff --git a/module3/exo3/exercice.ipynb b/module3/exo3/exercice.ipynb
index 4c11d8f6b483dc7c0b0daa6772e1326d47899183..deadaf0a7105a4b1ea3c6dcec2d1e37c720e1838 100644
--- a/module3/exo3/exercice.ipynb
+++ b/module3/exo3/exercice.ipynb
@@ -726,29 +726,42 @@
     "## Taux de mortalité (question 1)"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "Nous allons calculer le taux de mortalité sur la période pour les deux groupes de femmes: fumeuses et non fumeuses, et représenter les résultats sous forme d'un tableau."
+   ]
+  },
   {
    "cell_type": "code",
-   "execution_count": 32,
+   "execution_count": 36,
    "metadata": {},
    "outputs": [
     {
-     "ename": "SyntaxError",
-     "evalue": "invalid syntax (<ipython-input-32-15a64fef2e76>, line 8)",
-     "output_type": "error",
-     "traceback": [
-      "\u001b[0;36m  File \u001b[0;32m\"<ipython-input-32-15a64fef2e76>\"\u001b[0;36m, line \u001b[0;32m8\u001b[0m\n\u001b[0;31m    print form.format(*val)\u001b[0m\n\u001b[0m             ^\u001b[0m\n\u001b[0;31mSyntaxError\u001b[0m\u001b[0;31m:\u001b[0m invalid syntax\n"
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "                   Smokers  Non-Smokers\n",
+      "Vivantes        443.000000   502.000000\n",
+      "Mortes          139.000000   230.000000\n",
+      "Taux mortalité    0.238832     0.314208\n"
      ]
     }
    ],
    "source": [
-    "alive = [\"nb vivantes\", len(data[(data['Smoker'] == \"Yes\") & (data['Status'] == \"Alive\")].index), len(data[(data['Smoker'] == \"No\") & (data['Status'] == \"Alive\")].index)]\n",
-    "dead = [\"nb mortes\", len(data[(data['Smoker'] == \"Yes\") & (data['Status'] == \"Dead\")].index), len(data[(data['Smoker'] == \"No\") & (data['Status'] == \"Dead\")].index)]\n",
-    "deathrate = [\"taux mortalite\", dead[1]/(alive[1] + dead[1]), dead[2]/(alive[2] + dead[2])]\n",
+    "alive = [len(data[(data['Smoker'] == \"Yes\") & (data['Status'] == \"Alive\")].index), len(data[(data['Smoker'] == \"No\") & (data['Status'] == \"Alive\")].index)]\n",
+    "dead = [len(data[(data['Smoker'] == \"Yes\") & (data['Status'] == \"Dead\")].index), len(data[(data['Smoker'] == \"No\") & (data['Status'] == \"Dead\")].index)]\n",
+    "deathrate = [dead[0]/(alive[0] + dead[0]), dead[1]/(alive[1] + dead[1])]\n",
     "\n",
-    "tab = [[\"\", \"Smokers\", \"Non Smokers\"], alive, dead, deathrate]\n",
-    "form=\"{0:10}{1:10}{2:10}\"\n",
-    "for val in tab:\n",
-    "     print form.format(*val)"
+    "print(pd.DataFrame([alive, dead, deathrate], [\"Vivantes\", \"Mortes\", \"Taux mortalité\"], [\"Smokers\", \"Non-Smokers\"]))"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "On remarque que le taux de mortalité est - nettement - plus élevé dans le groupe des non fumeuses, ce qui constitue le paradoxe de Simpson"
    ]
   },
   {