Answered: Total Waiting Time (min) Number of…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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Question

Gasoline shortages in the United States have produced long lines of motorists at service stations. The table below shows a distribution of the times required to obtain gasoline at 23 Center County service stations.
(a) What is the average time required?
(b) If you were to ask randomly among those people waiting in line, “How long have you been waiting?” what would be the average of their answers?

(c) Can you generalize your results to predict how long you would have to wait to enter a five-story parking garage that has a 4-hour time limit?

Total Waiting
Time (min)
Number of Stations
Having That Total
Waiting Time
12
15
2
18
21

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