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.Com
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) (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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