I am currently studying for a business qualification I am stubling over a question.(adsbygoogle = window.adsbygoogle || []).push({});

It concerns calculating failure rate. The equation I know for this needs the number of failures over the total time.

However the question is: "A device has a reliability of 0.8 over 2000 hours, calculate the failure rate."

How can one firstly work of the number of failures from this? It doesn't give any other information, ie total sample size etc. just the reliability over 2000 hours.

Thanks

Andrew

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# Failure Rate Question

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