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a bag contains 20 balls out of which X balls are white if one ball is drawn at random the probability of drawing a white ball is why no place is ball and 10 more white balls in the back if a ball is drawn from the bag the probability of drawing the white ball is to Y find x... |
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Answer» A bag contains 20 BALLS out of which x balls are white Probability of White Ball = x/20 => y = x/20 place this ball and 10 more white balls in the bag => White Balls = x + 10 & Total Balls = 20 + 10 = 30 Probability of White Ball = (x + 10)/30 => 2y = (x + 10)/30 => 2 (x/20) = (x + 10)/30 => 3x = x + 10 => 2x = 10 => x = 5 |
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