(Answered) Your cable operator schedules an installation for sometime

Statistics

Your cable operator schedules an installation for sometime between 1:00 PM and 5:00 PM tomorrow afternoon. Assume that the arrival time of the installer is follows a uniform distribution over that time period.

You must leave your house between 2:30 and 3:45. What is the probability that the installer arrives when you are gone? Round your answer to 4 decimal places.

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