Given that P(A) = 0.5, P(B) = 0.6, and P(A and B) = 0.30, determine P(A|B)

Question

??

Answer 1

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

= .3/.6 = 1/2

Answer 2

still confusing to me why you would divide by P(B)....