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Lottery probability

  1. Feb 22, 2009 #1
    Probability question

    How do I solve

    (m t) >= 8.26E6

    ?
     
    Last edited: Feb 22, 2009
  2. jcsd
  3. Feb 22, 2009 #2
    I guess that you can represent it by a Poisson since N is large. I think that a Binomial( 1.859E-7, 19million) would describe X more accurately.

    If it were a binomial, then the expected value would be np = 19mil*1.859e-7. Your Poisson needs to have the same expected value, and since Poisson has only one parameter, lambda, which represents both the expected value and the variance, you know the answer.
     
  4. Feb 22, 2009 #3
    Thanks, I solved it and changed the topic.
     
  5. Feb 22, 2009 #4
    I don't understand the question
     
  6. Feb 23, 2009 #5

    HallsofIvy

    User Avatar
    Staff Emeritus
    Science Advisor

    Re: Probability question

    Without knowing what "(m, t)" means, I don't see how anyone can help!
     
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