Kenneth S. answered • 08/01/17

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Expert Help in Algebra/Trig/(Pre)calculus to Guarantee Success in 2018

5P3 is an example of nCr which is DEFINED as n! / (n-r)!

In this case, 5! / 2! has the 5•4•3 expansion...it's 5! but with the 2•1 having cancelled the last two factors of 5!

Answer 60 is entirely correct.