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SOLUTION: How many three-letter "words" can be made from the 9 letters FGHIJKLMN if repetition of letters: (a) Is allowed? Your answer is :729 (b) Is not allowed? Your answer is : 5 Algebra -> Permutations -> SOLUTION: How many three-letter "words" can be made from the 9 letters FGHIJKLMN if repetition of letters: (a) Is allowed? Your answer is :729 (b) Is not allowed? Your answer is : 5 Log On
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Question 726817: How many three-letter "words" can be made from the 9 letters FGHIJKLMN if repetition of letters: (a) Is allowed? Your answer is :729 (b) Is not allowed? Your answer is : 504 Answer by checkley79(3341) About Me (Show Source): You can put this solution on YOUR website! 9^3=729 ans. with repeats. 9*8*7=504 ans. no repeats.

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