diff --git a/module2/exo3/exercice_fr.Rmd b/module2/exo3/exercice_fr.Rmd
index e2c2ffac7cd0ed29d142ceaff4c1e449675f0fb3..203cf38a6522cb63b32007c3557e23247e317138 100644
--- a/module2/exo3/exercice_fr.Rmd
+++ b/module2/exo3/exercice_fr.Rmd
@@ -26,6 +26,7 @@ plot(liste, type="l", col="blue", panel.first=grid(), xlab = NA, ylab= NA)
 
 2. histograme
 ```{r}
-hist(liste, col="blue", panel.first=grid(), xlab = NA, ylab= NA, main = NA, nclass = )
+hist(liste, col="blue", panel.first=grid(), xlab = NA, ylab= NA, main = NA, ylim = c(0,25), xlim = c(0, 25))
+box()
 ```