1) It is given that the events A and B are such that P(A) = 1/4 , P(A/B) = 1/2 and P(B/A) = 2/3 then P(B) is? A) $\frac{1}{6}$ B) $\frac{1}{3}$ C) $\frac{2}{3}$ D) $\frac{1}{2}$ Answer: Option BExplanation:P(A) = 1/4 , P(A/B) = 1/2 and P(B/A) = 2/3 then P(B) By conditional probability P(A∩B) = P(A)P(B/A) = P(B)P(A/B) $\frac{1}{4}\times\frac{2}{3} = P(B)\times\frac{1}{2}$ P(B) = $\frac{1}{3}$
