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. Consider a (quite rudimentary) language whose alphabet only contains four letters (say: A, B, C, and D). a) How many three-letter words may exist in this language? b) How many three-letter words can be formed if letter repetition is disallowed, i. e., no letter can appear more than once in any given word? c) Would your answer for (b) change in the case of four-letter words? Explain.
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. Consider a (quite rudimentary) language whose alphabet only contains four letters (say: A, B, C, a...
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