SOLUTION: Solve. How many two-letter permutations can be made from the letters L, M, N, O, and P?

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Question 301566: Solve. How many two-letter permutations can be made from the letters L, M, N, O, and P?
Answer by nyc_function(2741) About Me  (Show Source):
You can put this solution on YOUR website!
A permutation is the choice of r things from a set of n things without replacement and where the order matters.
nPr = n!/(n - r)!
5P2 = 5!/(5 - 2)!
5P2 = 120/(3!)
5P2 = 120/6
5P2 = 20