SOLUTION: On a math test, 5 out of 20 students got an "A". If 2 out of the 20 students are chosen at random, what is the probability that all 3 got an "A" on the test?
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Question 567195: On a math test, 5 out of 20 students got an "A". If 2 out of the 20 students are chosen at random, what is the probability that all 3 got an "A" on the test? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! On a math test, 5 out of 20 students got an "A". If 2 out of the 20 students are chosen at random, what is the probability that all 3 got an "A" on the test?
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Binomial Problem with n = 3 and p(got A) = 1/4
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P(3 of 3 got A) = (1/4)^3 = 1/64
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Cheers,
Stan H.
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