Question

Use the given information to find the indicated probability.
P(A ∪ B) = .7, P(B) = .5, P(A ∩ B) = .3.

Find P(A).

Answer 1

hello :
P(A ∪ B) = P(A) + P(B) - P(A ∩ B)
0.7 =P(A) + 0.5 - 0.3
P(A)  =  0.7-0.5+0.3
P(A)  = 0.5