critical probability

in how many ways can be the first four letters of your name be arranged to form a three letter word,
(i)when the letter can be repeated
(ii)when the letter can not be repeated

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  1. E D W A

    as a 3-letter "word" = 4x4x4 = 64 ways if the letters can be repeated
    and 4x3x2 or 24 ways if the letters cannot be repeated.

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