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January 29th, 2012, 12:54 AM  #1 
Member Joined: Jan 2012 Posts: 72 Thanks: 0  No. of ways to form a number
A sixdigit number is to be formed from the digits 1, 2 ,3, 4, 5, 6, 7, 8, 9. Find how many ways the sixdigit number can be formed if the number must be odd and is less than 600,000 and no digit may appear more

January 29th, 2012, 03:37 AM  #2  
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 14,347 Thanks: 1024  Re: No. of ways to form a number Quote:
123457, 123459, ...., 598761, 598763 ; 18480  
January 29th, 2012, 04:35 AM  #3  
Math Team Joined: Dec 2006 From: Lexington, MA Posts: 3,267 Thanks: 408  Re: No. of ways to form a number Hello, Punch! Quote:
There are two cases to consider.  

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