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Math Help - Calculating poisson distribution probabilities?

  1. #1
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    Post Calculating poisson distribution probabilities?

    If X has a Poisson distribution such that 2P (X = 1) = P (X = 2), fi…nd P (X = 3)
    What is the 2P bit about? Thank you for any help.
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  2. #2
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    Quote Originally Posted by Intsecxtanx View Post
    If X has a Poisson distribution such that 2P (X = 1) = P (X = 2), fi…nd P (X = 3)
    What is the 2P bit about? Thank you for any help.
    Write an equation that says that twice the probability that X = 1 is equal to the probability that X = 2. Use this equation to solve for the mean. Then calculate the required probability.
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