Combinations (nCr) calculator

n =
r =
Combinations nCr:

The Combinations is a method of selecting several items or symbols out of a larger group or a data set, where an order does not matter. The Combination represented by nCr and calculated from the formula

Combination formula

nCr = n!/(r!(n - r)!)

Each r combination can be arranged in r! different ways. Then the number of r-permutations is equal to the number of r combinations times r!

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Combinations (nCr)calculator
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