bonjour
P ( A ∪ B) = P (A) + P (B) - P ( A ∩ B)
= 0.8 + 0.6 - 0.5
= 0.9
si P(A) = 0.8 , P (Non A) = 0.2
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bonjour
P ( A ∪ B) = P (A) + P (B) - P ( A ∩ B)
= 0.8 + 0.6 - 0.5
= 0.9
si P(A) = 0.8 , P (Non A) = 0.2