# How many different combinations of 15 alphabetized letters are possible? Using each letter only once

I think the question is self explanatory, but that's usually a bad assumption. Let me know if you need clarification. Thanks.

-

## migrated from mathematica.stackexchange.comNov 3 '12 at 18:09

This question came from our site for users of Mathematica.

That would be: $$\prod_{i=26}^{12} i$$