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Math

Answered

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

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Answer:

n P,r = (n!)/((n-r)!)

9 P,r = (9!)/((9-4)!)

9 P,r= (9!)/(5!)

9 P,r = (9×8×7×6×5×4×3×2×1)/(5×4×3×2×1)

9 P,r = (362880)/(120)

9 P,r = 3024

r=4

correct me if im wrong

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