Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Equivalent form for Binomial Expression?

  1. Jul 17, 2013 #1
    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.
     
  2. jcsd
  3. Jul 17, 2013 #2

    LCKurtz

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    Maybe something here will do:

    http://www.cs.columbia.edu/~cs4205/files/CM4.pdf
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook