MBA Exam

Two urns contain 3 white and 4 black balls,and 2 white and 5 black balls. One ball is transferred to the second urn and then one ball is drawn from the second urn. Find the probability that the first ball transferred isblack, given that the ball drawn is black.

1) 15/39
2) 39/56
3) 8/13
4) 10/39
5) 5/13

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MBA Other Question

what is the sum of coefficients in the expansion (3+2x)^99plz give approach

1) 5^99
2) 3^99
3) 2^99
4) 6^99
The points P, Q, R lie on a line in that order with PQ=9, QR=21. Let O be a point not on PR such that PO=RO and the distances PO and QO are integral. Then sum of all possible perimeters of triangle PRO is

1) 320
2) 350
3) 380
4) 410