A box A contains 2 white and 4 black balls. Another box B contains 5 white and 7 black balls. A ball is transferred from the box A to the box B. Then a ball is drawn from the box B. Find the probability that it is white.
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Box A and Box B will contain same amount of ball as before.
When we transferred 1 ball in to the box B the number of balls in
Box A = 1 white ball and 4 black ball
Box B = 6 white ball and 7 black ball
When we have drawn out 1 vall from box B the number of ball in
Box A = 2 white ball and 4 balck ball
Box B = 5 white ball and 7 black ball
Therefore the amount of the ball both black and white will he same as before
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