1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Multivariate Hypergeometric Distribution

  1. Mar 7, 2012 #1
    1. The problem statement, all variables and given/known data
    CQeI0.png

    I worked out A) just fine it seems (given the answer in the book), but B) i'm not sure how to take this out. Below was a try but i'm not sure i was even on the right track. Any ideas?

    2. Relevant equations
    x5s6D.png


    3. The attempt at a solution
    0oC3c.jpg
     
  2. jcsd
  3. Mar 7, 2012 #2
    Anyone have any ideas here?
     
  4. Mar 8, 2012 #3
    really, with over 400 views? no know can tackle this? Even Reddit at least took a shot at it. come on boys! lol, anything to get me started thinking right about this would help!
     
  5. Mar 8, 2012 #4

    Ray Vickson

    User Avatar
    Science Advisor
    Homework Helper

    In (b) you seem to have forgotten the cases (2,2,0,0), (0,2,0,2) and (2,0,0 2). Otherwise the basics are OK (but please in future try to attach more readable files: yours is incomprehensible on my laptop and on my i-phone; it shows up only on my desktop machine.)

    RGV
     
    Last edited: Mar 8, 2012
  6. Mar 8, 2012 #5
    "All nationalities but Italian are represented" So those three do not comply. It must have a zero for the third space, and contain at least one from each of the others, and must equal 4.
     
    Last edited: Mar 8, 2012
  7. Mar 8, 2012 #6
    ok, I answered my own question. the last two i added in would not work due to the criteria. so i guess you helped, thanks RGV. I'll try and find a better format to post these in.
     
  8. Mar 8, 2012 #7

    Ray Vickson

    User Avatar
    Science Advisor
    Homework Helper

    Sorry, I mis-read question (b). Your original solution is correct, and did not leave anything out (as I had erroneously suggested).

    RGV
     
  9. Mar 10, 2012 #8
    Thanks for looking at it regardless!! This site has helped me so much, I appreciate anyone's input!
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook