Question

Find P (A ∩ B′ ) when P (A ∪ B) = 0.8, P (A) = 0.5 and P (B) = 0.4

Answer 1

0.4

Explanation:

P(A∩B) = P(A)+P(B)-P(A∪B) = 0.5+0.4-0.8=0.1

P(A∩B') = P(A)-P(A∩B)=0.5-0.1 = 0.4