# Combination Calculator

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A combinationcalculator is used to calculate all possible combinations of selected items from a specific set. In mathematics, a combination refers to situations where the order of selection of a certain number of items from a set does not matter. Such calculations are widely used in probability theory, statistics, and various engineering fields.

For example, when you want to select 3 people from a group, the combination calculator calculates how many different ways this selection can be made. This is particularly useful when working with large numbers, as manual calculation can be very time-consuming and prone to errors.

The number of combinations is calculated using the binomial formula for selecting r elements from a set of n elements. This formula is **C(n,r) = n! / (r!(n-r)!).**

The combination calculator uses this formula to provide results quickly and without errors.