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Math Help - please help me on this probability

  1. #1
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    please help me on this probability

    1,Suppose a bus arrive at a bus stop every 20 minute and that
    the waiting time for the next bus to arrive as a uniform probability distribution on the interval
    from 0 to 20 minute.
    a,compute the mean and standard deviation of the persons waiting time x.what is the probability that x were seen 10 minute
    b,The probability density function of time x required to compute an assembly operation is uniformly distributed for the interval
    30</x</40

    i,Determine the proportion of assembly that requires less than 35 sec to complete
    ii,what time is exceeded for the waiting time x
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  2. #2
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    Quote Originally Posted by akosuaaddei View Post
    b,The probability density function of time x required to compute an assembly operation is uniformly distributed for the interval
    30</x</40

    i,Determine the proportion of assembly that requires less than 35 sec to complete
    1/2? You REALLY need help on this problem? Have you been going to class?

    Apply this to the bus problem. Show us what you get and how you got it.
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