Evaluate this problem

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(subscript 54) C (subscript 54)

The answer key says this is equal to 1. Can someone explain this to me? 

Feb 6th, 2015

N (C) R = n! /[( r!) (n-r)!]
54 C 54 = 54! / [54! ( 54 - 54)!] = 1/ 0! = 1/1 = 1


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Feb 6th, 2015

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Feb 6th, 2015
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Feb 6th, 2015
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