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Homework Help: Statistics - arrangement in a circle

  1. Sep 19, 2011 #1
    1. The problem statement, all variables and given/known data
    Delegates from the G8 are to be seated around a circular table. How many different seating arrangements are possible if the French and Canadian delegates are to be seated next to each other, but the Russian and Japanese are not to be next to each other?


    2. Relevant equations
    n!/n

    3. The attempt at a solution
    I know that if they were seated in a row, the answer would be (7!x2) - (6!x4), but I do not know where to start when it comes to arranging them in a circle
     
  2. jcsd
  3. Sep 19, 2011 #2
    Hint: the number of permutations of n objects in a circle is (n - 1)!.
     
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