1. Not finding help here? Sign up for a free 30min 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!

A Problem in Discrete Probability

  1. Oct 3, 2008 #1
    I recently came across a page named "Gems of Discrete Probability" - http://www.cse.iitd.ernet.in/~sbaswana/Puzzles/Probability/exercises.html

    Being a mathematics enthusiast, I tried the first question. Being very rusty in probability, I failed to come up with a satisfying answer: the best I got (for the first question, the expected number of empty bins) was an "open" formula:

    n /n\ /n-1\
    ∑ k * \k/ * \ k /
    \ n /
    Where the notation \k/ is the binomial coefficient, n!/k!(n-k)! .
    Is there any way to get rid of the ∑ here, is my solution wrong, is there any way to solve it that will not result in a sum, or is that the best answer?
    Thanks in advance,
    Woolly Rhino.
    Last edited: Oct 3, 2008
  2. jcsd
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Can you help with the solution or looking for help too?
Draft saved Draft deleted

Similar Discussions: A Problem in Discrete Probability
  1. Discrete Math problem (Replies: 1)