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Math Help - Probability Help

  1. #1
    Junior Member
    Joined
    Dec 2007
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    32

    Probability Help

    Hi

    Here's the question:

    The pdf p for the total waiting time for two buses is given by

    (1/25)x 0 ≤ x < 5
    F(X) = (2/5) (1/25)x 5 ≤ x < 10
    0 otherwise

    Find the 90th percentile and the expected waiting time for any of the two buses.
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  2. #2
    MHF Contributor
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    2
    F(A) = 0.90

    Solve for 'A'

    Read the definition of pdf and cdf again.
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