Question

If P(9,r)=3024, what is n?

Answer 1

Heya...
✌Here is your answer.. ✌

9Pr = 3024

9!/(9-r)! = 3024

(9-r)! = 9!/3024

(9-r)! = 120

(9-r)! = 5!

9-r = 5

r = 4 ✔✔✔

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