algebra 2

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How many possible arrangments are there of the letters A,B,C,D,E,F in which E and F are not next to eachother?

  • algebra 2 -

    with no restriction there would be 6! or 720 ways

    the no of ways in which the E and F are together = 2(5!) ways or 240

    so the number of ways the E and F are apart are 720 - 240 or
    480 ways.

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