Combination Calculator

In finite mathematics a combination is most typically calculated using the formula C(n,r) = ^n!/_r!(n-r)!. In this formula n represents the total number of items and r represents the number of items to choose. The formula is modified depending on the importance of item order and repeating items in the set of allowed results.

n - Items to Choose From

r - Number to Choose

Combinations Possible

the same items in different orders

Example: Combination Apple-Orange is the same as Orange-Apple (count once)

the same item more than once

Example: Combination Apple-Apple is not allowed (not counted)

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2024