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Math Help - Combinatorics QUESTION 2-3

  1. #1
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    Combinatorics QUESTION 2-3

    Let A = {a_1, a_2, . . . , a_k} be an alphabet, and let n_i denote the number of appearances of
    letter a_i in a word. How many words of length n in the alphabet A are there for which
    k = 3, n = 10, n_1 = n_2 + n_3 and n_2 is even?
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  2. #2
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    Re: Combinatorics QUESTION 2-3

    Hey maximus101.

    Can you show us what you have tried? Is a word just a string of the same letter? If you have to have a separator between the words thn gives a hint of the upper limit of words.
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