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OpenStudy (anonymous):
determine the number of permutation of 18 items taken 5 at a time.
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OpenStudy (anonymous):
18 chooses 5 = 1028160?
OpenStudy (anonymous):
ok thanks :)
OpenStudy (anonymous):
np
OpenStudy (cruffo):
I though the phase "18 choose 5" usually refers to combinations not permutations. Combinations: \[18C5 = \frac{18!}{5!(18-5)!}\] Permutations: \[18P5 = \frac{18!}{(18-5)!}\]
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