bonjour
aime les maths n'aiment pas total
- 20 ans 8 16 24
+ 20 ans 26 10 36
total 34 26 60
proba A = 36/60 = 0.6
proba B = 26/60 = ≅ 0.43
proba C = 10/60 ≅ 0. 16
proba D = P (A) ∪ P ( B) = P(A) + P(B) - P ( A ∩B )
= 0.6 + ≅ 0.43 - ≅0.16 = ≅ 0.87