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OpenStudy (anonymous):
Evaluate C(n, n).
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Directrix (directrix):
C(n,n) means n objects selected n at the time. The answer is 1. C(n,n) = n! / [ (n-n)! n!] = n!/[0! * n!] = n! / [1 * n!] = 1.
OpenStudy (anonymous):
answer is 1
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