diff --git a/03-Gaussians.ipynb b/03-Gaussians.ipynb
index afc8af8..9a9b45f 100644
--- a/03-Gaussians.ipynb
+++ b/03-Gaussians.ipynb
@@ -367,7 +367,7 @@
     "Each side is equally likely, so each has a probability of 1/6. Hence\n",
     "$$\\begin{aligned}\n",
     "\\mathbb E[X] &= 1/6\\times1 + 1/6\\times 2 + 1/6\\times 3 + 1/6\\times 4 + 1/6\\times 5 + 1/6\\times6 \\\\\n",
-    "&= 1/6(1+2+3+4+5+6)\\\\&= 3\\end{aligned}$$\n",
+    "&= 1/6(1+2+3+4+5+6)\\\\&= 3.5\\end{aligned}$$\n",
     "\n",
     "### Exercise\n",
     "\n",
@@ -2163,7 +2163,7 @@
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    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.6.4"
+   "version": "3.6.5"
   },
   "widgets": {
    "application/vnd.jupyter.widget-state+json": {