Feuille d`exercices

◦
18!
16!
30!
27! ×3!
(n+ 1)!
n!
(n+ 2)!
n!
5×6×7×8n(n+ 1)(n+ 2)
9
0 11 1 7 3 12 4 12 8(2
0)(9 5)+(2 1)(9 4)+(2 2)(9 3)
(11
5)
X
X
P[X= 0] P[X= 2]
N1N2n
X1, X2
N1= 4, N2= 6, n = 5.
X1
X2
N1= 40, N2= 60, n = 5.
X1P[X=k]
valeurs :k012345
P[X1=k]
P[X1=k]
1 500
A
20% B30% C50%
25
3A
3A
12 A B
8C
B25

70%
70%
20
8
70%
X∼ B(n, p)m(X)=7,2var(X) =
3,96
n p
P[4 6X67] P[X > 13]
kP[X>k]60,05
16 12 4
4
3 1