Combinations Calculator
Calculate C(n,r) - combinations where order does NOT matter. Find how many ways to select r items from n items.
What are Combinations?
A combination is a selection of objects where ORDER DOES NOT MATTER. C(n,r) counts how many ways to select r items from n items.
Formula
C(n,r) = n! / (r!(n-r)!)
Example
Selecting 3 people from a group of 5 for a committee: C(5,3) = 10 ways