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lana66690 [7]
3 years ago
7

How many three-letter "words" can be made from 9 letters "fghijklmn" if repetition of letters (a) is allowed?

Mathematics
1 answer:
11Alexandr11 [23.1K]3 years ago
8 0
729. You just do 9 to the power of 3 or 9^3 and you will get 729. If it is not allowed, the answer is 504.(9 x 8 x 7)
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As you can see in the attached picture:

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