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Sagot :

VINS

Réponse :

bonjour

Branche  A

P (A) = 0.7  ⇒ P (B) = 0.8

branche  NOn A = 0.3 ⇒ Branche B = 0.4

P ( A ∩ B) =  0.7 x 0.8 = 0.56

P ( A ∪ non B) =  0.7 x 0.2 = 0.14

P  (Non A ∩ B) = 0.3 x 0.4 = 0.12

P ( Non A ∩ non B) = 0.3 x 0.6 = 0.18

P (B) = 0.7 x 0.8 + 0.3 x 0.4 = 0.56 + 0.12 = 0.68

Explications étape par étape :

Réponse:

p(B) = p(AnB) +p(ĀnB)

p(B) = 0.56 + 0.12

p(B)= 0.68

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