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Mahesh
Posts:
5
From:
India
Registered:
3/2/12


Re: RE: Permutation problems
Posted:
May 19, 2012 2:35 AM


I could make some progress after your reply. I thought of doing it other way round. So now the sets are: A: Contain fish A=23! B: Contain rat B=24! C: Contain bird C=23! A n B: 21! A n C: 20! B n C: 21! A n B n C: 18!
A' n B' n C'= Total permutations  (A u B u C) = 26!(23! + 24! + 23!  21!  20!  21! +18!) =4.0261.... * 10 ^ 26 Let me know if this is correct. Thank you.



