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Math Help - Independance probability question

  1. #1
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    Independance probability question

    Hi

    I understand that for a event to have independence it follows that
    P(A and B)= P(A) x P(B)

    however i cannot understand this question

    I have attached the question

    any help is appreichated.
    Attached Thumbnails Attached Thumbnails Independance probability question-probability-question.gif  
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  2. #2
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    Oct 2008
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    Hi

    Maybe you can use another definition:

    P(B|A)=\frac{P(B \cap A)}{P(A)}

    i) Since the result of A will affect that of B, e.g. If A is 1 or 3, P(B)=2/5, If A is 5, P(B)=3/5, hence they are dependent.
    Last edited by noob mathematician; May 25th 2009 at 08:02 PM.
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