Combinations Calculator

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An online calculator to calculate the number of combinations of n elements taken r a the time whose formula is given below.

Use of Combinations Calculator

1 - Enter the positive integers n (total number of objects) and r (the number of objects in each group) and press "Calculate Combinations".

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Formula for the Number of Combinations

The number of combinations of n objects taken in groups of r objects at the time is given by
n C r = C(n , r) = n! / [(n-r)! r!]

More References and Links

Permutations and Combinations Problems
Permutations Calculator
Math Calculators and Solvers.
Power Calculator.