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5. A) A VCR has an exponential failure time distribution, with an average time of 20,000...

5. A) A VCR has an exponential failure time distribution, with an average time of 20,000 hours. If the VCR has lasted 20,000 hours, then the probability that it will fail at 30,000 hours or earlier is:

B) Of the following normal curves, with the parameters indicated, the one that most closely resembles the curve with parameters ϻ = 10 and σ = 5 and it is:

C) The service time at the window of a certain bank follows an exponential distribution with an average of 2 minutes. The probability that the service time for the next customer is 3 minutes or more is:

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