# Math Help - Ordered Arrangement

1. ## Ordered Arrangement

Hello everyone!

How can I solve the following?

How many different ordered arrangement can be formed
using the letter P E P P E R?

I know I need to use permutations, but the is there any special rules when the letters repeat?

Thanks!

atwinix

2. Originally Posted by atwinix
Hello everyone!

How can I solve the following?

How many different ordered arrangement can be formed
using the letter P E P P E R?

I know I need to use permutations, but the is there any special rules when the letters repeat? Mr F says: Yes. It should be in your class notes or textbook.

Thanks!

atwinix
$\frac{6!}{4! 2!} = \, ....$

3. Thanks mr fantastic, that is a great reference

4. Originally Posted by mr fantastic
$\frac{6!}{4! 2!} = \, ....$

$\frac{6!}{3! 2! 1!}$