Question

Please help! If P(A)=0.2 and P(A and B)=0.12, and P(A or B)=0.68, what is P(B)?

0.8
0.08
0.6
0.06

Answer 1

P(B) = 0.6

Explanation:

P(A and B) = P(A) * P(B)

0.12 = 0.2 * P(B)

P(B) = 0.6

P(A or B) = P(A) + P(B) - P(A and B)

0.68 = 0.2 + P(B) - (0.12)

P(B) = 0.6