Question

Let A and B be two independent events. If P(A) = .25, what can you say about P(A | B)? Cannot find it since P(A and B) is not known. Cannot find it since P(B) is not known. Cannot find it since both P(A and B) and P( B) are not known. It is equal to .5. It is equal to .25.

Answer 1

P(A|B) = P(A and B)/P(B)

in order to calculate P(A|B), both P(A and B) and P(B) is required.

Hence Cannot find it since both P(A and B) and P( B) are not known.