1)a
total de souris blanche + grise = 30+55 + 7+8 = 85 +15 = 100
85 souris blanche
proba : 85/100
b
total femelle + male = 55+8 + 30+7= 100
proba femelle : 55+8/100 = 63/100
c
proba de choisir un male gris = 7/100
2)
total souris blanche : 55+30 = 85
proba femelle = 55/85
Exercice 5
1)
image de 5 :
(7*5) - 3
= 35-3 = 32
2)
1 = 7x - 3
4 = 7x
x = 4/7
3)
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