InclusionExclusion Principle
 From: "Little" <cookiecandyred@xxxxxxxxx>
 Date: 3 Dec 2005 10:19:03 0800
Could someone explain to me how to use the InclusionExclusion
Principle to solve this problem.
Question: A carousel has eight seats, each seat is distinct. Eight
girls are seated on the carousel facing forward ( each girl looks at
another girl's back). In how many ways can they change seats so that
each has a different girl in front of her? How can the problem change
when the seats are identical?
Thanks a lot for the help.
.
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