# How do you evaluate 5P5?

##### 2 Answers

Jun 18, 2017

The simple answer is 120.

#### Explanation:

Whenever you select ALL of the objects and order matters, the formula for

Since

In general, though, if you are only selecting r of the objects -- not necessarily all of them:

Jun 18, 2017

120

#### Explanation:

Given this:

Replacing...

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