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Math Help - Committee of People Rotated Around a Table

  1. #1
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    Committee of People Rotated Around a Table



    Just Part I. I had (8! x 3!)/10 ; and the answer says (7! x 3!).

    Could someone explain to me which one is right and why please?

    Thank You.
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  2. #2
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    Re: Committee of People Rotated Around a Table

    Let us consider an arrangement where the teenagers sit together.
    The rest of the seven persons who are not teenagers can be arranged in 7! ways
    The three teenagers can themselves sit in 3! ways.
    therefore the total number of arrangements are
    7!X3!
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