A guard works betwwen 5 pm and 12 midnight he sleeps an

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A guard works betwwen 5 p.m. and 12 midnight; he sleeps an average of 1 hour before 9 p.m., and 1.5 hours betwween 9 and 12. An inspector finds him asleep, what is the probability that this happens before 9 p.m.?

Reference no: EM13639859

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