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September 27th, 2008, 07:41 AM  #1 
Senior Member Joined: Sep 2008 Posts: 199 Thanks: 0  permutation and combination
5 girls are to be arranged in a row . Find the number of ways of arranging them if the tallest and the shortest girl must not be at either end of the row

September 27th, 2008, 11:45 AM  #2 
Global Moderator Joined: Nov 2006 From: UTC 5 Posts: 16,046 Thanks: 938 Math Focus: Number theory, computational mathematics, combinatorics, FOM, symbolic logic, TCS, algorithms  Re: permutation and combination
# of choices for first slot * # of choices for last slot * (# of remaining choices)!


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