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@@ -10,4 +10,7 @@ My computer tells me that π is approximately **3.141592653589793**
 But calculated using the [Buffon's needle](https://en.wikipedia.org/wiki/Buffon's_needle) method, we would obtain as an approximation **3.128911138923655**
 
 ### 2.1.3  With a "Surface Frequency" Argument
-Otherwise, by applying a Monte Carlo method to a quarter-circle surface of radius 1, we approach π/4
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+Otherwise, by applying a Monte Carlo method to a quarter-circle surface of radius 1, we approach π/4
+
+## 2.2 Doing a simple calculation on your own
+- Quelle est la moyenne What is the average is  14.11
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