There is only one copying machine in the student lounge of the business school. Students arrive at the rate of λ = 45 pe

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There is only one copying machine in the student lounge of the business school. Students arrive at the rate of λ = 45 per hour (according to a Poisson distribution). Copying takes an average of 40 seconds, or u-90 per hour (according to a negative exponential distribution). a) The percentage of time the machine is used 50 percent (round your response to the nearest whole number). b) The average length of the queue students (round your response to two decimal places).