You arrive at CS109 Office Hours to find that 5 CS109 CAs—Yonatan, Will, Kathleen, Jacob, and Naomi—are all present, and each is working with some fellow CS109 student of yours. You notice there are nine other students in front of you in the queue and no one is behind you. It looks like you'll be the last of 10 students to be helped. We'll assume the time each CA spends with a student can be modeled as an Exponential random variable such that, on average, each CA finishes helping precisely 6 students every hour. As a CA finishes helping a student, they immediately start helping the next student in line and remove them from the queue. Question: What's the average amount of time, in minutes, that it takes for the first student in the queue to start getting help? You can prove your result mathematically, or you can provide a compelling argument why your answer is what it is. Present your answer to two decimal places.
You arrive at CS109 Office Hours to find that 5 CS109 CAs—Yonatan, Will, Kathleen, Jacob, and Naomi—are all present, and each is working with some fellow CS109 student of yours. You notice there are nine other students in front of you in the queue and no one is behind you. It looks like you'll be the last of 10 students to be helped.
We'll assume the time each CA spends with a student can be modeled as an Exponential random variable such that, on average, each CA finishes helping precisely 6 students every hour. As a CA finishes helping a student, they immediately start helping the next student in line and remove them from the queue.
Question: What's the average amount of time, in minutes, that it takes for the first student in the queue to start getting help? You can prove your result mathematically, or you can provide a compelling argument why your answer is what it is. Present your answer to two decimal places.
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