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Homework Help: Conditional probability

  1. Oct 14, 2009 #1
    1. The problem statement, all variables and given/known data
    A baseball player compiles the following information :

    He hits a home run in 34% of his games
    He gets a strike out in 40% of his games
    In 78% of his games he hits a home run or his team wins
    In 10% of his games he hits a home run and gets a strike out
    In 26% of his games he hits a home run and his team wins
    In 28% of his games he gets a strike out and his team wins
    In 7% of his games he hits a home run, gets a strike out and his team wins

    What is the probability that the players team wins if he doesn't hit a home run ?

    The attempt at a solution
    P(W| H\prime)=\frac{P(W \cap H\prime)}{P(H(\prime)}= \frac{P(H)-P(W\cap H)}{1-P(H)} [/tex]

    How come l use this equation l get the wrong answer ? Can someone please correct me on where l am wrong ?
    Last edited: Oct 14, 2009
  2. jcsd
  3. Oct 15, 2009 #2


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    Homework Helper

    maybe show & explain what you did will help find where you went wrong
  4. Oct 15, 2009 #3
    The only hint I can probably suggest is for you to focus on what is being asked, analyze the question very carefully, then gather the informations given above that "only" relates to the question.
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