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2013-05-04T17:19:54+02:00

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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