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 January 13th, 2009, 01:05 AM #1 Newbie   Joined: Dec 2008 Posts: 6 Thanks: 0 Solving for N in permutation problems Please help me in this one..i'm quite confuse... How am I going to solve for n in permutation problems like this P(n, 1) = 7 please give me any hint...can you pls give it now..im waiting
January 13th, 2009, 12:46 PM   #2
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Re: Solving for N in permutation problems

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 Originally Posted by sheen_daphne Please help me in this one..i'm quite confuse... How am I going to solve for n in permutation problems like this P(n, 1) = 7 please give me any hint...can you pls give it now..im waiting
It would help if you could define P(n,1).

 January 13th, 2009, 04:45 PM #3 Senior Member   Joined: Oct 2007 From: Chicago Posts: 1,701 Thanks: 3 Re: Solving for N in permutation problems p(n,k) = n!/(n-k)! P(n,1) = n!/(n-1)! = 7 Think about how factorial is defined. Try replacing n! with x*y! for some x and y. And it should fall right out.

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