About This Tool
This combination calculator computes the number of ways to choose r items from a set of n distinct items where order does not matter. It uses the nCr formula n! / (r! × (n - r)!) to give exact results for any valid input.
Calculate combinations (nCr) — the number of ways to select items from a set without regard to order.
Combinations (nCr)
120
This combination calculator computes the number of ways to choose r items from a set of n distinct items where order does not matter. It uses the nCr formula n! / (r! × (n - r)!) to give exact results for any valid input.