Question 478461: how to solve this problem an urn contains 6 red, 4 blue, 2 green, 3 yellow marbles. if 4 marbles are picked at random , what is the probability that at least one is blue
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! how to solve this problem an urn contains 6 red, 4 blue, 2 green, 3 yellow marbles. if 4 marbles are picked at random , what is the probability that at least one is blue
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P(at least one blue) = 1 - P(none is blue)
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= 1 - [11C4/15C4]
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= 1 - [330/1365]
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Cheers,
Stan H.
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