What is the percentage failure rate

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Penatech produces 3250 computer chips per day. Each day, a sample of 350 chips is tested for a period of 144 operating hours each. During the test, 1 failed at 15 hours, 4 failed at 40 hours, 3 at 72 hours, and 5 failed at 84 hours.

Enter the following numbers to two decimal places of precision. If the answer should be expressed as a percentage, omit the % sign.

What is the percentage failure rate?

What is the mean time between failures in hours?

If the mean time to repair a chip is 9, what is the percentage availability for a chip?

Reference no: EM13899698

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