SOLUTION: How many 3-letter "codes" can be made from 7 letters "LMNOPQR" if repetition is not allowed?

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Question 1170619: How many 3-letter "codes" can be made from 7 letters "LMNOPQR" if repetition is not allowed?
Found 2 solutions by Boreal, ikleyn:
Answer by Boreal(15235) About Me  (Show Source):
Answer by ikleyn(52794) About Me  (Show Source):
You can put this solution on YOUR website!
.

We are given 7 (seven) different  letters.



      In codes, the order DOES MATTER.

      Therefore, we consider PERMUTATIONS - not combinations.



The number of all 3-letter codes is  7*6*5 = 210.


ANSWER.   210 different codes.


Do not accept any other answer.