During the course registration period, the students at a college of engineering visit their advisers to discuss taking additional lectures to improve their grades. The students line up in the hallway outside the adviser’s office. The students arrive at the office according to the probability distribution on the first table. The time required by the adviser to examine and approve a schedule corresponds to the following probability distribution on the second table:

Time between arrivals (minutes) Probability
15 0.35
25 0.45
35 0.10


Time to get approval (minutes) Probability
20 0.25
25 0.45
30 0.25
35 0.05

Simulate the arrival of 100 students in Excel. Compute the average time between arrivals, average waiting time, the average time that a student spends to get approval.


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