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Math Help - Poisson distribution of a Fair Coin?

  1. #1
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    Poisson distribution of a Fair Coin?

    Consider tossing a fair coin 40,000 times. Let X be the number of times heads comes up. Suppose X has Poisson distribution with mean 2.4. Find P(X>=2).

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    I have no idea how to do this one. This maybe wrong attempt.

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  2. #2
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    Re: Poisson distribution of a Fair Coin?

    Quote Originally Posted by blackZ View Post
    Consider tossing a fair coin 40,000 times. Let X be the number of times heads comes up. Suppose X has Poisson distribution with mean 2.4. Find P(X>=2).

    =========
    I have no idea how to do this one. This maybe wrong attempt.

    The answer is given by 1 - Pr(X = 0) - Pr(X = 1).

    Then you use the Poisson pmf to calculate each probability ---> basic calculator work.
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  3. #3
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    Re: Poisson distribution of a Fair Coin?

    Sorry. I did not get anything.
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    Re: Poisson distribution of a Fair Coin?

    Quote Originally Posted by blackZ View Post
    Sorry. I did not get anything.
    I have told you what to do. If you need more help, you will need to be much more specific than the above comment.
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  5. #5
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    Re: Poisson distribution of a Fair Coin?

    Ok, So what are the first steps. I need to get it started.
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  6. #6
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    Re: Poisson distribution of a Fair Coin?

    Quote Originally Posted by blackZ View Post
    Ok, So what are the first steps. I need to get it started.
    Read post #2! It tells you what to do! What don't you understand!?
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