Math
Permutation & Combination
Compute nPr (arrangements) and nCr (selections) for two integers n and r.
Inputs
Permutation & Combination
Result
10C3
120
- 10P3 (arrangements)
- 720
- n! / (n−r)!
- 720
How it's calculated
nPr = n! / (n−r)!. nCr = n! / (r!(n−r)!).
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