Bag A contains 9 white and 8 black balls, while bag B contains 6 white and 4 black balls. One ball is randomly picked up from the bag B and mixed up with the balls in the bag A. Then a ball is randomly drawn from the bag A. If the probability, that the ball drawn is white, is 
, then 
is equal to
Text Solution
Verified by ExpertsA
Bag A: 
. Bag B: 
.
Case 1: White transferred from 
. A becomes 
white from A 
.
Case 2: Black transferred from B (prob 
). A becomes 9 W, 9 B. 
white from A 
.
Total probability 
.
. So 
.
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