SOLUTION: There are 20 students in a fraternity. In how many ways can a committee of 11 students be selected?

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Question 580727: There are 20 students in a fraternity. In how many ways can a committee of 11 students be selected?
Answer by stanbon(75887) About Me  (Show Source):
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There are 20 students in a fraternity. In how many ways can a committee of 11 students be selected?
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If order of selection makes a difference
the answer is 20P11 = 20!*19! = 20*19*...*10 = 6.7044..X 10^12
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If order does not make a difference
the answer is 20C11 = (20*19*...*10)/(1*2*3*...*11) = 167960
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Cheers,
Stan H.