Permutation / Computation Guide

KRabble88
Thu, 01 Sep 2005 22:34:56 +0000

1337, how do I calculate nPr(4,2)? I remember there was a longer form of it, like n!/(n-r)! or something like that. Also, what do the parenthesis represent and how do I use that to calculate a numerical answer?

Sorry, I was never good at combinations/permutations :(