Equivalent form for Binomial Expression?

eddybob123 · Jul 17, 2013

Is there a way to express ##{n\choose k}{n\choose r}## in another form without n as the "top" of the binomial coefficient? I remember seeing it once but I forgot what it was.

LCKurtz · Jul 17, 2013

eddybob123 said:

Is there a way to express ##{n\choose k}{n\choose r}## in another form without n as the "top" of the binomial coefficient? I remember seeing it once but I forgot what it was.

Maybe something here will do:

http://www.cs.columbia.edu/~cs4205/files/CM4.pdf

Equivalent form for Binomial Expression?

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