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math

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A,B,C, and D are sitting along one side of a table. In how many different orders could the four friends be sitting?

  • math -

    a b c d
    a b d c

    a c b d
    a c d b

    a d b c
    a d c b

    Well, six ways for each of the four starting letters
    6*4 = 24

  • math -

    By the way
    4! = 4*3*2*1 = 24

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