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Math Help - Probabililty -college level

  1. #1
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    Probabililty -college level

    Hi, i need help with these following questions:

    1. An investment advisor recommends the purchase of shares in Probabilistics, Inc. He has made the following predictions:

    P(Stock goes up 20% Rise in GDP) = .6
    P(Stock goes up 20% Level GDP) = .5
    P(Stock goes up 20% Fall in GDP) = .4

    An economist has predicted that the probability of a rise in the GDP is 30%, whereas the probability of a fall in the GDP is 40%.
    • What is the probability that the stock will go up 20%?
    • We have been informed that the stock has gone up 20%. What is the probability of a rise or fall in the GDP?
    2. Suppose 300 misprints are distributed randomly throughout a book of 500 pages. Find the probability p that a given page contains (i) exactly 2 misprints, (ii) 2 or more misprints.
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  2. #2
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    Quote Originally Posted by Anam123 View Post
    Hi, i need help with these following questions:

    1. An investment advisor recommends the purchase of shares in Probabilistics, Inc. He has made the following predictions:

    P(Stock goes up 20% Rise in GDP) = .6
    P(Stock goes up 20% Level GDP) = .5
    P(Stock goes up 20% Fall in GDP) = .4


    An economist has predicted that the probability of a rise in the GDP is 30%, whereas the probability of a fall in the GDP is 40%.
    • What is the probability that the stock will go up 20%?
    • We have been informed that the stock has gone up 20%. What is the probability of a rise or fall in the GDP?
    2. Suppose 300 misprints are distributed randomly throughout a book of 500 pages. Find the probability p that a given page contains (i) exactly 2 misprints, (ii) 2 or more misprints.
    Q1 (a) (0.6)(0.3) + (0.5)(0.3) + (0.4)(0.4) = ....
    (b) [(0.6)(0.3) + (0.4)(0.4)]/[(0.6)(0.3) + (0.5)(0.3) + (0.4)(0.4)]

    Q2 Get the mean number of misprints per page and note that the number of misprints on a page follows a Poisson distribution.
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  3. #3
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    thank u for the answers!
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