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A hag contains 7 white, 5 black and 4 red balls. If two balls are drawn at random, find the probability that : (i) both the balls are white (ii)one ball is black and the other red (iii) both the balls are of the same colour. |
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Answer» A hag contains 7 white, 5 black and 4 red balls. If two balls are drawn at random, find the probability that : (i) both the balls are white (ii)one ball is black and the other red (iii) both the balls are of the same colour. |
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