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I don't understand the concept and all the steps in solving these questions.

For an example, How would( 13C4 ), be solved?
Guest Apr 13, 2012
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[input]ncr( 13, 4 )[/input]

13C4 = ncr( 13, 4 ) = 13! / ( 4! * 9! )
admin  Apr 13, 2012

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