diff --git a/03-Gaussians.ipynb b/03-Gaussians.ipynb
index a284d4a..024f631 100644
--- a/03-Gaussians.ipynb
+++ b/03-Gaussians.ipynb
@@ -358,7 +358,7 @@
    "source": [
     "### Exercise\n",
     "\n",
-    "What is the expected value of a die role?\n",
+    "What is the expected value of a die roll?\n",
     "\n",
     "### Solution\n",
     "\n",