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A basket contains 6 blue, 2 red, 4 gr...

A basket contains 6 blue, 2 red, 4 green and 3 yellow balls. If 5 balls are picked up at random, what is the probability that at least one is blue? `(137)/(143)` (b) `(18)/(455)` (c) `9/(91)` (d) `2/5` (e) None of these

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