Mathematics, 30.10.2020 17:40 chdt510m1

Components that are critical for the operation of electrical systems are replaced immediately upon failure. Suppose that the life time of a certain such component has a mean of 100 hours and a standard deviation of 55 hours. How many of these components must be in stock to ensure a probability that at least 0.95 for the system to be in continuous operation for at least the next 2000 hours

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