From: jafary92 <jafary92@teacher.com>
To: Teacher2Teacher Public Discussion
Date: 2000071705:27:25
Subject: Re: Permutations

Hi
As U know, n! is simply a notation for the product of first n natural
numbers and it plays an imp role in counting problems. When we solve a
counting problem and if we need to use the product of natural numbers
again and again then it becomes very easy if we use some kind of
special notation...

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