Question

You are given that P(A U B) = 0.7 and P(A U B') = 0.9
Then what is the value of P(A).
A) 0.6 B)0.2 C)0.3 D)0.4

Answer 1

0.6

Answer 2

How

Answer 3

P(A U B^c) = [1 - P(A U B)] + P(A).

Thus, .9 = (1 - .7) + P(A) = .3 + P(A)

---> P(A) = .6

Answer 4

@Zekarias ok

Answer 5

Ok understood