Mathematics, 23.07.2019 12:30 TightKnowsDaWhey

Joe wants to find all the four-letter words that begin and end with the same letter. how many combinations of letters must he examine? a word is any sequence of letters, such as mthm, and does not have to be english.

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Joe wants to find all the four-letter words that begin and end with the same letter. how many combin...

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