diff --git a/03-Gaussians.ipynb b/03-Gaussians.ipynb
index 5039bfe..2453e0a 100644
--- a/03-Gaussians.ipynb
+++ b/03-Gaussians.ipynb
@@ -8973,7 +8973,7 @@
     "\n",
     "The product of two independent Gaussians is given by:\n",
     "\n",
-    "$$\\begin{aligned}\\mu &=\\frac{\\sigma_1^2\\mu_2 + \\sigma_1^2\\mu_1}{\\sigma_1^2+\\sigma_2^2}\\\\\n",
+    "$$\\begin{aligned}\\mu &=\\frac{\\sigma_1^2\\mu_2 + \\sigma_2^2\\mu_1}{\\sigma_1^2+\\sigma_2^2}\\\\\n",
     "\\sigma^2 &=\\frac{\\sigma_1^2\\sigma_2^2}{\\sigma_1^2+\\sigma_2^2} \n",
     "\\end{aligned}$$\n",
     "\n",