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#4 question attached The life, in years, of a certain type of electrical switch has an exponential distribution with an average life =2. If 200

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The life, in years, of a certain type of electrical switch has an exponential distribution with an average life =2. If 200 of these switches are installed in different systems, what is the probability that at most 70 fail during the rst year? Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. The probability is . (Round to four decimal places as needed.)

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