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Math Help - stats problem

  1. #1
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    stats problem

    Hey im having some problems with probability and here are the two homework questions.

    1)What is the probability that you will pass a test and get at least 4 questions correct by randomly guessing on each question of a 6 question quiz multiple choice quiz with 5 choices for each question.

    2) Every year at least 5 million people die of tobacco related causes, assume that the distribution is normal with a population mean of 5 million and a standard deviation of 2 million...find the probability that more than 4 million people will die of tobacco related causes and find the 75th percentile of the distribution of tobacco related deaths.

    any help is appreciated!
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  2. #2
    MHF Contributor harish21's Avatar
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    for no.1 use binomial distribution.

    n = 6

     p = \frac{1}{5}

    and then find

    P(X \geq 4)
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  3. #3
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    thanks... how about number 2?
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  4. #4
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    Quote Originally Posted by coheedfan1990 View Post
    thanks... how about number 2?
    Indeed. What have you tried? Where are you stuck?
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