Random Sampling Probability Puzzle

A random sample of 200 adults is classified is below according to gender and level of education attained

[TABLE="class: grid"]
[TR]
[TD]Education[/TD]
[TD]Male[/TD]
[TD]Female[/TD]
[/TR]
[TR]
[TD]Elementary[/TD]
[TD]38[/TD]
[TD]45[/TD]
[/TR]
[TR]
[TD]Secondary[/TD]
[TD]28[/TD]
[TD]50[/TD]
[/TR]
[TR]
[TD]College[/TD]
[TD]22[/TD]
[TD]17[/TD]
[/TR]
[/TABLE]



If a person is selected at random from this group, find the probability that-

  1. The person is male provided given that the person has secondary education
  2. The person does not have a college degree, given that the person is a female.
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  • Reya
    Reya

    @reya-SMihdC • Sep 15, 2011

    O.36 and 0.85?

    0
  • Reya
    Reya

    @reya-SMihdC • Sep 15, 2011

    Method:

    M-a person is a male
    S-a person has a secondary education
    C-a person has a college degree

    a)P(M/S)=28/78
    b)P(C'/M')=95/112

    0
  • CIVILPRINCESS
    CIVILPRINCESS

    @civilprincess-308hDv • Sep 15, 2011

    ReyaMethod:

    M-a person is a male
    S-a person has a secondary education
    C-a person has a college degree

    a)P(M/S)=28/78
    b)P(C'/M')=95/112

    even i'm getting the same answer! 😀

    0