SOLUTION: Tom is the custodian at the local high school. He has a circular key ring with 9 keys on it. How many different arrangements of those keys can Tom make on his key ring?
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Question 1009480: Tom is the custodian at the local high school. He has a circular key ring with 9 keys on it. How many different arrangements of those keys can Tom make on his key ring? Answer by ikleyn(52803) (Show Source):
