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Thread: Help with probability please

  1. #1
    Oct 2006

    Help with probability please

    2 people decided to meet each other on a certain day between 5 and 6 pm. They arrive (independently) at a uniform time between 5 and 6 and wait for 15 minutes. What is the probability that they meet each other?
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  2. #2
    MHF Contributor

    Aug 2006
    If X & Y are the times that each of the two friends arrive, then you want the probability that $\displaystyle
    \left| {X - Y} \right| < 15$. Look at the graph. What is the probability that the random point (X,Y) is between the two blue lines?

    Now, I have a word of caution for you. You have had a great many of these problems, probably take-home problems, worked for you. If you are doing any of this online you need to read my posting about online courses.
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