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Math Help - [SOLVED] number of ways

  1. #1
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    [SOLVED] number of ways

    Section 6 #8

    There are 6 different ways to arrange the 3 letters E,F, and F in a row from left to right. HOw many more ways are there to arrange the 4 letters D,E,F,G in a row from left to right?

    The correct answer is 18. Any tips? Thanks in advance
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  2. #2
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    Simple

    For D,E,F,G

    There will be 4!( 4x3x2x1) ways to be arranged and so 24 and the question is asking how many more ways so 24-6=18

    At the end did you learn factorials
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