Ben Brink
Posts:
198
From:
Rosenberg, TX
Registered:
11/11/06


RE: Permutation problems
Posted:
Aug 11, 2013 7:32 PM



Mark,
Would like to comment, but I never received either of the original problems!
Thanks,
Ben
> Date: Sun, 11 Aug 2013 16:00:13 0400 > From: discussions@mathforum.org > To: discretemath@mathforum.org > Subject: Re: Permutation problems > > The same fish/rat logic (inclusion/exclusion) needs to be applied to the second problem as well. For example, 9876450123 has been counted three times. > I believe the solution is: > 7!+8!+7!  (5!+4!+5!) + 2!

