# Combination Calculator

After entering the number of elements and selection you want to learn the combination of, press the calculate button.

Below this page, you can also find the answers for frequently asked questions about this subject.

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## What is a combination?

These are selections made within a group of objects, regardless of order. An example is the selection of any 4 cards from a deck of playing cards.

## How is the combination calculated?

The sum of the r-element combinations selected from a n-element set, n, greater than or equal to r, is calculated by the following formula.