Question 250512: sam has a bag with 2 red, 7 yellow, and 5 blue marbles in it. if he pulls out 3 marbles, what is the probability that at least one of them is blue?
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! sam has a bag with 2 red, 7 yellow, and 5 blue marbles in it. if he pulls out 3 marbles, what is the probability that at least one of them is blue?
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General Rule:
P(at least one) = 1 - P(none)
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Your Problem:
P(none are blue) = 9C3/14C3 = 0.2308
P(at least one) = 1 - 0.2308 = 0.7692
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Cheers,
Stan H.
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