# What is a permutation of a set

## permutation

**We will deal with the term permutation in this article. We will explain to you what is meant by permutation and provide you with suitable examples. This article belongs to the field of mathematics.**

Sometimes you ask yourself: How many ways are there to seat a certain number of people on chairs? Example: There are 4 people and 4 chairs. How many options are there to put these people on the chairs? Permutation is used to answer this question.

Show:**Permutation: what is it?**

Every possible arrangement of n elements in which all elements are used is called the permutation P of these elements. For a better overview, there is now a list of requirements that must be met:

- All elements of the initial set differ from one another.
- All elements must be selected.
- An element cannot be selected more than once.

The formula for calculating this is: **P = n! **(spoken: P is equal to n-factorial)

**Example 1:**

There are 4 people and 4 chairs. How many options are there to put these people on the chairs?

Solution: P = 4! = 4 * 3 * 2 * 1 = 24

**Example 2:**

The letters A, B and C should be shown in all arrangements. How many options are there and what are they?

Solution: P = 3! = 3 x 2 x 1 = 6

**Left:**

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