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How many three-letter words can be made from the four letters WXYZ if repetition of letters is allowed

How many three-letter "words" can be made from the four letters "WXYZ" if

a) repetition of letters is allowed?

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b) repetition of letters is not allowed?

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Now, use your answers to parts (a) and (b) to answer the following question:

c) What percent of the three-letter "words" that can be made from the four letters "WXYZ" have no repeated letters? Round your answer to the nearest tenth of a percent, if necessary.

Apr 25 2020 View more View Less

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