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From: jafary92 <firstname.lastname@example.org> 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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