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Math Help - Marginal Probability

  1. #1
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    Marginal Probability

    Suppose there are 40 students in a certain university and were asked wheather they are in favour of or against the wearing of school uniform.

    Male-In favour (6)-Against(9)-Total(15)
    Female-Infavour(17)-Against(18)-Total(25)
    Calculate the Marginal Probability for
    a)p(male),b)P(female),c)P(in favour),P(against)

    Attempt
    a)15/40=3/8
    b)25/40=5/8
    c)23/40
    d)27/40

    Am I correct?
    Thank you
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  2. #2
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    Quote Originally Posted by mj.alawami View Post
    Suppose there are 40 students in a certain university and were asked wheather they are in favour of or against the wearing of school uniform.

    Male-In favour (6)-Against(9)-Total(15)
    Female-Infavour(17)-Against(18)-Total(25) Mr F says: The total is 35 ....?
    Calculate the Marginal Probability for
    a)p(male),b)P(female),c)P(in favour),P(against)

    Attempt
    a)15/40=3/8
    b)25/40=5/8
    c)23/40
    d)27/40

    Am I correct?
    Thank you
    ..
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  3. #3
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    Quote Originally Posted by mr fantastic View Post
    ..
    Yes you are correct-didn't realize that mistake

    **Female -favour (7)-Against(18)-Total(25)

    Attempt:
    a)15/40=3/8
    b)25/40=5/8
    c)13/40
    d)27/40

    Am I correct now ?
    Thank you..
    Last edited by mj.alawami; June 15th 2009 at 06:17 AM.
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