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Math Help - space of an experiment

  1. #1
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    Post space of an experiment

    The sample space of an experiment is {A,B,C,D} and P(A)-0.1, P(B)=0.3. P(C)=0.4, P({A,C})= what? My answer is 0.1x0.4=0.4 is this right, I'm not sure if I set the problem up right. thanks for any help given.
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  2. #2
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    Quote Originally Posted by kwtolley View Post
    The sample space of an experiment is {A,B,C,D} and P(A)-0.1, P(B)=0.3. P(C)=0.4, P({A,C})= what? My answer is 0.1x0.4=0.4 is this right, I'm not sure if I set the problem up right. thanks for any help given.
    No in this case the points in the sample space are disjoint events, and

    P({A,B})=P(A)+P(B)=0.5

    That is event A can occur, or event B, ... , D, but two cannot occur. The
    sum of the probabilities over the sample space is 1.

    RonL
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