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Thread: probability being late

  1. August 4th 2009, 03:27 AM #1
    thereddevils
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    probability being late

    The probability that James is late for school on normal days is 0.01 .However , the probability that James is late for school on a rainy day is 0.02 . The probability that it would rain on Monday is 0.005 .What would be the probability that James would be late on Monday ?
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  2. August 4th 2009, 03:44 AM #2
    Plato
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    Quote Originally Posted by thereddevils View Post
    The probability that James is late for school on normal days is 0.01 .However , the probability that James is late for school on a rainy day is 0.02 . The probability that it would rain on Monday is 0.005 .What would be the probability that James would be late on Monday ?
    R^c means it does not rain.
    P(L)=P(L\cap R)+P(L\cap R^c)=P(L|R)P(R) + P(L|R^c)P(R^c).
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