🎯 Permutation & Combination Calculator
Calculate permutations (nPr) and combinations (nCr) for any values of n and r.
Permutation (nPr)
720
P(10,3)
Combination (nCr)
120
C(10,3)
nPr = 10! / 7! = 720
nCr = 10! / (3! × 7!) = 120
nCr = 10! / (3! × 7!) = 120
Permutation & Combination Calculator
Calculate permutations (nPr) and combinations (nCr) with detailed formula breakdown. Supports values up to n=170.
Frequently Asked Questions
What is the difference between permutation and combination?
Permutation (nPr) considers order (ABC ≠ ACB), while combination (nCr) ignores order (ABC = ACB).
What is the formula for nCr?
nCr = n! / (r! × (n-r)!), where ! is factorial.
Can I calculate large values?
JavaScript handles factorials up to 170. Values beyond that may lose precision.