Asked Oct 30, 2019

How many different three-letter words (including nonsense words) can be formed allowing repetition of letters?


Expert Answer

Step 1

From the given information, three letter words formed allowing repetition of letters.

Three letter in the words is TOO, so n is 3 and in this word there are 2 letters repeating that (x) is 2. Need a 3 letter arrangements, So choosi...


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Numberof letters can be formed


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