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题库 / Prep2007E1-PS-77
At a dinner party, 5 peopleare to be seated around a circular table. Two seating arrangements are considered different only when thepositions of the people are different relative to each other. What is the total number of different possibleseating arrangements for the group?
5
10
24
32
120
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5!/5, 5个人随便坐=5！，因为是圆桌，那么会同一个顺序会出现5次，比如BACDE, CDEBA, DEBAC, and EBACD are all the same outcome as ACDEB，所以5！/5
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