diff --git a/ipynb/Probability.ipynb b/ipynb/Probability.ipynb
index 4e1b22f5..81e476ba 100644
--- a/ipynb/Probability.ipynb
+++ b/ipynb/Probability.ipynb
@@ -280,7 +280,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "Now I want to define `Hands` as the sample space of all 5-card combinations from `deck`. The function `itertools.combinations` does most of the work; we than concatenate each combination into a space-separated string:\n"
+    "Now I want to define `Hands` as the sample space of all 5-card combinations from `deck`. The function `itertools.combinations` does most of the work; we then concatenate each combination into a space-separated string:\n"
    ]
   },
   {