Question: A student has purchased a laptop computer for use during exams. This laptop is perfectly reliable except for two parts: its microchip, which has a

A student has purchased a laptop computer for use during exams. This laptop is perfectly reliable except for two parts: its microchip, which has a MTBF

= 30

hours

and its battery, which has a MTBF

= 25

hours. Assuming that a new battery has just been installed, what is the probability that the battery will perform reliably during a

3

hour exam?

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