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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 picked up at random, what is the probability that either both are green or both are yellow? `5/(91)` (b) `1/(35)` (c) `1/3` (d) `4/(105)` (e) None of these

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