Combination Calculator
Math CalculatorsCalculate the number of ways to choose items from a set.
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Combinations (nCr)
About This Tool
Free online Combination Calculator (nCr). Determine the number of ways to select r items from a group of n items where order does not matter.
Frequently Asked Questions
The formula for combinations is nCr = n! / [r! * (n - r)!], where order is not considered in the selection of items.
Use combinations when you need to find the number of groups you can form where the sequence of members within the group is irrelevant.
This calculator handles n up to 170 due to JavaScript's factorial limit. For larger sets, advanced statistical software is usually required.
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