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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  
Global Moderator Joined: May 2007 Posts: 6,770 Thanks: 700  Re: Solving for N in permutation problems Quote:
 
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!/(nk)! P(n,1) = n!/(n1)! = 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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