Combination Calculator (nCr)

Calculate combinations (nCr) instantly. Find how many ways to choose r items from n items when order doesn't matter. Free combination calculator.

Total Items (n)

Choose (r)

Formula

C(10, 3) = 10! / (3! × (10 - 3)!)

Number of Combinations

120

Calculation Steps

10! = 3628800

3! = 6

(10 - 3)! = 5040

Explanation: There are 120 ways to choose 3 items from 10 items when order doesn't matter.

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