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If P( 9,r ) = 3,024, what is r ? plz plz plz... help mè I mark it... :(​
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4 votes
If P( 9,r ) = 3,024, what is r ?

plz plz plz... help mè

I mark it... :(​

User Juan Balmori
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1 Answer

5 votes

Answer:


(9i)/((9 - r)i) = 3024 \\ (9 - r)i = 9i / 3024 = 362880 / 3024 = 120 = \\ = 1 * 2 * 3 * 4 * 5 = 5i \\ r = 4

User Lixinso
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