For `k=1,2,3` the box `B_k` contains k red balls and `(k+1)` white balls. Let `P(B_1)=1/2,P(B_2)=1/3 and P(B_3)=1/6`.A box is selected at random and a ball is drawn from it. If a red ball is drawn, then the probability that it has come from box `B_2`, is

Fpr L=1,2,3 the box B_k contains k red balls and (k+1) white balls . Let P(B_1) =1/2 , P(B_(2))=1/3 ,P(B_3)=1/6 . A box is selected at random and a ball is drawn from it . If a red ball is drawn, then the probability that it has come from box B_2 is

Box A contains 2 black and 3 red balls while box B contains 3 black and 4 red balls.Out of the setwo boxes one is selected at random and the probability of choosing box A is double that of box B.If a red ball is drawn from the selected box,then the probability that it has come from box B is

Box A contains 2 black and 3 red balls, while box B contains 3 black and 4 red balls . Out of these two boxes one is selected at random, and the proability of choosing box A is double that of box B. if a red ball is drawn from the selected box then the proability that is has come from box B is

A box contains 3 blue, 2 white and 4 red balls. If A ball is drawn from the box what is the probability that the ball is not white.

Three boxes numbered, I, II, III contain balls as follows {:(,"White","Black","Red"),(I, 1,2,3),(II, 2,1,1),(III, 4 ,5, 3):} One box is randomly selected and a ball is drawn from it. If the ball is red, then the probability that it is from box II.