Sania Mirza is to play with Sharapova in a three set match. For a particular set, the probability of Sania winning the set is √y and if she wins probability of her winning the next set becomes y else the probability that she wins the next one becomes y2. There is no possibility that a set is to be abandoned. R is the probability that Sania wins the first set.
If R = 1/2 and Sania wins the second set, then the probability that she has won first set as well is nearly equal to
(A) 0.74
(B) 0.46
(C) 0.26
(D) 0.54
