diff --git a/Algo/Séminaire/Chapter 3 - Case analysis.md b/Algo/Séminaire/Chapter 3 - Case analysis.md
index 62f038b..2aa4738 100644
--- a/Algo/Séminaire/Chapter 3 - Case analysis.md	
+++ b/Algo/Séminaire/Chapter 3 - Case analysis.md	
@@ -142,3 +142,10 @@ val succ: int -> int = <fun>
 ```
 > ⚠️ Learn by heart
 
+**Exemple with `avg` function**
+```Ocaml
+# let avg = function a -> function b -> (a+b)/2
+val avg : int -> int -> int = <fun>
+```
+> 💭 We read that like "let avg the function that to a associate the function that to b associate a+b divided by two"
+