Difference between revisions of "2007 AMC 8 Problems/Problem 4"
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Revision as of 15:56, 15 February 2010
Problem
A haunted house has six windows. In how many ways can Georgie the Ghost enter the house by one window and leave by a different window?
Solution
Georgie can enter the haunted house through any of the six windows. Then, he can leave through any of the remaining five windows.
So, Georgie has a total of ways he can enter the house by one window and leave by a different window.
Our answer is ,