Question: Ninety identical electrical circuits are monitored at an extreme temperature to see how long they last before failing. The 50th failure occurs after 263 minutes.

Ninety identical electrical circuits are monitored at an extreme temperature to see how long they last before failing. The 50th failure occurs after 263 minutes. If the failure times are modeled with an exponential distribution, when would you predict that the"80th failure will occur?

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