diff --git a/module2/exo1/toy_notebook_en.ipynb b/module2/exo1/toy_notebook_en.ipynb
index e1d1fb5ed7723e40c4d3caed60777330be7ad0be..23b0c875b96042ad6fc8adabea97529910fbb368 100644
--- a/module2/exo1/toy_notebook_en.ipynb
+++ b/module2/exo1/toy_notebook_en.ipynb
@@ -118,7 +118,9 @@
    "execution_count": null,
    "metadata": {},
    "outputs": [],
-   "source": []
+   "source": [
+    "4*np.mean(accept)"
+   ]
   }
  ],
  "metadata": {