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January 29th, 2010, 05:40 AM  #1 
Newbie Joined: Jan 2010 Posts: 2 Thanks: 0  Permutation
Calculate the number of even numbers between 5000 and 7000 which can be formed from the digits 1,5,6 and 8 if repetitions are allowed. I tried working on this question and came to 48 but, the answer given is 60. Can anyone help me??? Thank you! 
January 29th, 2010, 07:16 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 Quote:
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