SOLUTION: A combination of 10 nurses are selected out of 90 for a study. 20 of the 90 nurses are male (70 female). What is the probability that exactly 4 of the 10 will be male (6 female)?

Question 736710: A combination of 10 nurses are selected out of 90 for a study. 20 of the 90 nurses are male (70 female). What is the probability that exactly 4 of the 10 will be male (6 female)?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
A combination of 10 nurses are selected out of 90 for a study. 20 of the 90 nurses are male (70 female). What is the probability that exactly 4 of the 10 will be male (6 female)?
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# of ways to succeed: 20C4 * 70C6
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# of possible outcomes: 90C10
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P(4 male and 6 female) = [20C4*70C6]/90C10 = 0.1110
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Cheers,
Stan H.
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