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Mathematics, 14.12.2020 04:10 VamPL
Suppose you have n items from which you choose r at a time. Explain why you must divide the number of permutations n!(n−r)! fraction n factorial , over open n minus r close factorial end fraction by r! to find the number of combinations n!r!(n−r)!.
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Suppose you have n items from which you choose r at a time. Explain why you must divide the number o...
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