Question 1048647
P(A') =0.3 ===> P(A) = 1-P(A') = 1-0.03 = 0.7.


===> P(A∩B) = P(A) + P(B) - P(A∪B) = 0.7 + 0.5 - 0.9 = 1.2 - 0.9 = 0.3.