SOLUTION: perform the indicated calculation 9C4 ___ 12C4 I don'tunderstand what the question is asking.

Question 297487: perform the indicated calculation
9C4
___
12C4

I don'tunderstand what the question is asking.
Answer by user_dude2008(1862) (Show Source): You can put this solution on YOUR website!
9 C 4 = 9!/4!(9-4)! = 9!/(4!5!) = (9*8*7*6*5!)/(4!5!) = (9*8*7*6)/(4*3*2*1) = 126

12 C 4 = 12!/4!(12-4)! = 12!/(4!8!) = (12*11*10*9*8!)/(4!8!) = (12*11*10*9)/(4*3*2*1) = 495

(9 C 4)/(12 C 4) = 126/495 = 14/55 = 0.25454545
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