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An urn contains 9 balls two of which are red, three blue and four black. Three balls are drawn at random. The probability that they are of the same colour is(a) 5/84(b) 3/9(c) 3/7(d) 7/17 |
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Answer» An urn contains 9 balls two of which are red, three blue and four black. Three balls are drawn at random. The probability that they are of the same colour is (a) 5/84 (b) 3/9 (c) 3/7 (d) 7/17 |
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