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3 August, 20:06

A bag contains 15 balls of which some are white and some are black the probability of drawing a black ball is 2 by 3 so find the number of white balls in the back

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  1. 3 August, 20:24
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    probability of black ball is 2/3.

    so number of black ball is given as = total ball * prob of black ball

    = 15*2/3 = 5*2 = 10

    so black balls are 10

    so white balls are = 15 - 10 = 5
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