SOLUTION: If Benny has 5 different pens in how many different ways can he arrange them?

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Question 781430: If Benny has 5 different pens in how many different ways can he arrange them?
Answer by dkppathak(439) About Me  (Show Source):
You can put this solution on YOUR website!
number of permutation in a line =n factorial
total number of pen are 5
so total permutation =5 factorial
=5x4x3x2x1=120
answer 120