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How many combinations can be made using of fifteen thing taken four at a time?
Wiki User
∙ 11y ago
Formula: nCr = n! divided by (n-r)! x r!
where n is the number of things to choose from and you choose r of them
15C4 = 15!divided by (15-4)! x 4! = 1365 ways
Wiki User
∙ 11y ago
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