SOLUTION: In a class of 15 people exactly 3 got A's. If two people are randomly chosen from this class, what is the probability that at least one of these two people got and A?
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Question 549048: In a class of 15 people exactly 3 got A's. If two people are randomly chosen from this class, what is the probability that at least one of these two people got and A? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! In a class of 15 people exactly 3 got A's. If two people are randomly chosen from this class, what is the probability that at least one of these two people got and A?
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P(at least 1 got A) = 1 - P(none got A)
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P(none got A) = 12C2/15C2 = 0.6286
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P(at least 1 got A) = 1 - 0.6286 = 0.3714
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Cheers,
Stan H.
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