bonjour,
bonbons sucettes total
chocolat 8 20 28
fruits 12 20 32
total 20 40 60
proportion de sucettes = 40/60 = 0.67
proportion de bonbons aux fruits = 12/60 = 0.2
proportion de bonbons = 12/32 = 0.375
Chiens Chats Total
Mâles 21 11 32
Femelles 63 25 88
Total 84 36 120
proportion de chats femelles = 25/120 = 0.2
