Question

Find the indicated probability.

If P(B) = 0.5, P(A or B) = 0.3, and P(A and B) = 0.6.

P(A) =

Answer 1

P(A) = x
P(A or B) = P(A) + P(B) - P(A and B)
0.3 = x + 0.5 - 0.6
0.3 = x - 0.1
0.3 + 0.1 = x
0.4 = x
x = 0.4
So P(A) = 0.4

Answer 2

hope this help :)