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Math Help - Arrangement around a circle

  1. #1
    Senior Member pankaj's Avatar
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    Arrangement around a circle

    20 married couples are to be seated around a circular table.In how many ways can they be made to sit if men and women sit alternately and that no women sits adjacent to her husband.
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    Quote Originally Posted by pankaj View Post
    20 married couples are to be seated around a circular table.In how many ways can they be made to sit if men and women sit alternately and that no women sits adjacent to her husband.
    Hi pankaj,

    This is a famous problem called the menage problem. You can find a discussion here:

    Ménage problem - Wikipedia, the free encyclopedia
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