SOLUTION: Evaluate: 17C9

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Question 823936: Evaluate: 17C9
Answer by jim_thompson5910(35256) About Me  (Show Source):
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n C r = (n!)/(r!(n-r)!)

17 C 9 = (17!)/(9!*(17-9)!)

17 C 9 = (17!)/(9!*8!)

17 C 9 = (17*16*15*14*13*12*11*10*9!)/(9!*8!)

17 C 9 = (17*16*15*14*13*12*11*10)/(8!)

17 C 9 = (17*16*15*14*13*12*11*10)/(8*7*6*5*4*3*2*1)

17 C 9 = (980179200)/(40320)

17 C 9 = 24310