Determine the following: a) Percent of failures = 50% (enter your response as a b) Number of failures per unit-hour of operating time = percentage rounded to one decimal place). failures per hour (round your response to eight decimal places).

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Hi, I need help finding the answer to part B of this Operations Management problem. Thanks!

*Note: "1.19047619" has been attempted and is not the correct answer.

A manufacturer of disk drives for notebook computers wants a MTBF of at least 50,000 hours. Recent test results for 12 units were two failures at 8,000 hours, two at 24,000 hours, and two more at 40,000 hours.
The remaining units were still running at 60,000 hours.
Determine the following:
a) Percent of failures = 50 % (enter your response as a percentage rounded to one decimal place).
b) Number of failures per unit-hour of operating time =
failures per hour (round your response to eight decimal places).
Transcribed Image Text:A manufacturer of disk drives for notebook computers wants a MTBF of at least 50,000 hours. Recent test results for 12 units were two failures at 8,000 hours, two at 24,000 hours, and two more at 40,000 hours. The remaining units were still running at 60,000 hours. Determine the following: a) Percent of failures = 50 % (enter your response as a percentage rounded to one decimal place). b) Number of failures per unit-hour of operating time = failures per hour (round your response to eight decimal places).
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