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Stardoll
@Stardoll
May 2019
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Bonsoir, svp j'ai réellement besoin d'aide je bloque sur un exercice et je doit le rendre pour demain
Merci d'avance pour toute aide.
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guestnosdevoir
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Bonsoir,
Ex4:
X suit la loi B(5 , 3/4)
1)a) p(X=0)=(1/4)⁵
p(X=1)=5C1×(3÷4)^(1)×(1÷4)^(4) =0,0146484375
b)p(X≥2)=1-[p(X=0) + p(X=1)]= .....(calculer c’est facile)
2) E(X)=n.p=5.(3/4)=15/4.
a) E(-4X+3)=-4.E(X)+3=-4×(15÷4)+3=-12.
:)
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Bonsoir,Ex4:
X suit la loi B(5 , 3/4)
1)a) p(X=0)=(1/4)⁵
p(X=1)=5C1×(3÷4)^(1)×(1÷4)^(4) =0,0146484375
b)p(X≥2)=1-[p(X=0) + p(X=1)]= .....(calculer c’est facile)
2) E(X)=n.p=5.(3/4)=15/4.
a) E(-4X+3)=-4.E(X)+3=-4×(15÷4)+3=-12.
:)