diff --git a/module2/exo2/exercice_fr.Rmd b/module2/exo2/exercice_fr.Rmd
index 7c91f1ef8816beb0880a7c1a553fae630aab81bc..8a534d69eeb8fb5ff95e609c4a740d652a6dcf2b 100644
--- a/module2/exo2/exercice_fr.Rmd
+++ b/module2/exo2/exercice_fr.Rmd
@@ -19,3 +19,8 @@ summary(x)
 ```
 
 
+Je calcul l'écart type
+```{r}
+sd(x)
+```
+