10C2 i know the answer is 45. but for some reason, i can't get THAT answer. i keep getting something else.... anyone help me please? thank you in advance!
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Originally Posted by Big-K 10C2 i know the answer is 45. but for some reason, i can't get THAT answer. i keep getting something else.... anyone help me please? thank you in advance! 10 C 2= after dividing denomonator and numerator by 8! the following is obtained
But does this 10 C 2= have anything to do with the 2nd step? if it does, how? thank you!
Originally Posted by Big-K But does this 10 C 2= have anything to do with the 2nd step? if it does, how? \frac{10*9*8*7*6*5*4*3*2*1}{8*7*6*5*4*3*2*1*2*1} thank you! well ,I assumed that you know this: and Substituting this gives:
Last edited by mr fantastic; Jan 25th 2009 at 10:46 PM. Reason: Added some spacing to make it easier to read.
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