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31 March, 11:01

How many different linear arrangements are there of the letters A, B, C, D, E, F for which A is before B.

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  1. 31 March, 11:36
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    5.4. ways for A to be before B, then 3.2. ways for C to be before D, multiplied by 2. because we could do the reverse (5.4. ways for C to be before D, then 3. 2. ways for A to be before B. so that is the best thing i know i learned in math class.
  2. 31 March, 12:49
    0
    There is none. I don't think there is any possible way for there to be any linear arrangements before the letter A.
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