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An urn contains 6 red, 4 blue, 2 gree...

An urn contains 6 red, 4 blue, 2 green and 3 yellow marbles. If two marbles are drawn at random from the urn, what is the probability that both are red? `1/6` (b) `1/7` (c) `2/(15)` (d) `2/5` (e) None of these

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