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How many different 4-letter words can be made a. if the first letter must be C or Z and no letter may be repeated? b.

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How many different 4-letter words can be made a. if the first letter must be C or Z and no letter may be repeated? b. if repeats are allowed (but the first letter is C or Z)? c. How many of the 4-letter words (starting with C or Z) with no repeats end in J? a. If the first letter must be C or Z, and all the letters in the word must be different, then there are 4-letter words

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