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Math Help - Quick Combinatorics Question.

  1. #1
    Newbie
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    Mar 2009
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    Quick Combinatorics Question.

    Q:
    In how many ways can a photographer at a wedding arrange 6 people in a row, including the bride and groom, if the bride is positioned somewhere to the left of the groom?

    A:
    I came to the answer, 5*5! = 600



    Is my answer correct? If not, please correct me.

    Thanks,
    Creative
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  2. #2
    MHF Contributor
    Grandad's Avatar
    Joined
    Dec 2008
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    South Coast of England
    Posts
    2,570

    Combinatorics

    Hello Creative
    Quote Originally Posted by Creative View Post
    Q:
    In how many ways can a photographer at a wedding arrange 6 people in a row, including the bride and groom, if the bride is positioned somewhere to the left of the groom?

    A:
    I came to the answer, 5*5! = 600



    Is my answer correct? If not, please correct me.

    Thanks,
    Creative
    If we ignore the restriction, there will be 6! ways of arranging the people in a row. On half of these, the bride will be on the left of the groom...

    Grandad
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