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Math Help - probability of rain

  1. #1
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    probability of rain

    Please help with this:

    Suppose in recent years, it has only rained an average of 5 days a year. The weather forecast, which has an accuracy of 90%, predicts rain for tomorrow. What is the probability of rain tomorrow?

    A: <1%
    B: between 5 and 15%
    C: between 15 and 80%
    D: between 80 and 90%
    E: > 90%

    Thank you!
    Last edited by wh88; September 8th 2012 at 08:39 PM.
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