Formula to calculate combination. n represents the total number of items. r represents the number of items being chosen at a time. To calculate a
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1. Some graphing calculators offer a button to help you solve combinations without repetition quickly. It usually looks like nCr. If your calculator has one, hit your n{\displaystyle n} value firs See more
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How to calculate the number of possible combinations? For n people sitting on k chairs, the number of possibilities is equal to n* (n-1)* (n-2)*1 divided by the number of
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