SOLUTION: How many different ways can a committee of 9 be selected from a larger organization of 20 people? I am sure this is a combination problem. Which is 9C20=(just Guessing) 20!

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Question 203403: How many different ways can a committee of 9 be selected from a larger organization of 20 people?
I am sure this is a combination problem.
Which is 9C20=(just Guessing) 20! 20!
______ = ________
9!(20-9) 9!11!
20! 20*19*18*17*16*15*14*13*12*11*10*9*8*7*6*5*4*3*2*1
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9!
i guess im confused. big numbers.
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
you're right, just a combination problem

20C9 = 20! / [(20 - 9)! * 9!] = 20! / (11! * 9!)

there should be a factorial key on your calculator
___ windows has a built in calculator -- just set it to scientific mode