Combinations & Permutations Calculator
Combination (nCr)
Permutation (nPr)
Factorial (n!)
Total items (n):
Items to choose (r):
Number (n):
C(10, 3) = 10! / (3! × 7!) =
120
Number of Combinations
120
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A combination is a selection where order doesn't matter. Choosing {A, B, C} is the same as {C, B, A}.