There are 12 people in a dinner gathering. In how many ways can the host (one of the 12) arrange his guests around a dining table if a. they can sit on any of the chairs? b. 3 people insist on sitting beside each other? c. 2 people refuse to sit beside each other?

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Answers

2016-03-07T22:55:30+08:00
A. 11*11=132 ways, b. 11*8=88 ways, c. 11*10=110 ways
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