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Math Help - Probability Related Questions (Math/Biology)

  1. #1
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    Probability Related Questions (Math/Biology)

    Of the members of a track and field club, 42% entered track events at the most recent provincial meetings, 32% entered field events and 20% entered both.

    What is the probability that a randomly selected member of the club
    i) entered either a track event or a field event at the pronvicial meet?

    ii) did not compete at the meet?

    THE ANSWER IS 0.46 and 0.54. CaN ANYONE SHOW ME HOW THEY GOT THAT?
    Last edited by Sniped_X; October 22nd 2007 at 07:18 PM.
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  2. #2
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    Not biology related anymore sorry changed the question
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  3. #3
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    Hello Sniped X for the first one \frac{42}{100} signed up for a track event and \frac{32}{100} signed up for a field event however \frac{20}{100} signed up for both

    So now we get \frac{42}{100} + \frac{32}{100} - \frac{20}{100} = \frac{54}{100}

    So now we have that value that \frac{54}{100} did participate which means the remaining \frac{46}{100} did not.
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