Find the indicated probability.

Question

If​ P(A or ​B)equals=0.7 ​P(A)equals=0.3 and​ P(A and ​B)equals=0.15 find​ P(B).
​P(B)equals=

Answer 1

Either-or probabilities are found by adding the individual probabilities.

P(A or B)= P(A) + P(B) = .03 + P(B) = .07

P(B) = .04

Typos?