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OpenStudy (anonymous):

9C3 over 11C3 Please help. I can't figure this out.

OpenStudy (anonymous):

So in this expression, if C3 one term or are they seperate?

OpenStudy (anonymous):

It's a little 9 C and a little 3 over a little 11 C and a little 3

OpenStudy (anonymous):

so exponents?

OpenStudy (anonymous):

Yes.

OpenStudy (welshfella):

a quick way to do them is 9*8*7 ---- = 9C3 3*2*1

OpenStudy (welshfella):

oh if they are exponents forget the above!

OpenStudy (anonymous):

Ok.

OpenStudy (welshfella):

the way they are written could mean 9C3 is the number of combinations taken 3 at a time of 9 items

OpenStudy (anonymous):

How do I do the math?

OpenStudy (welshfella):

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