Customers Arrive at the One Remaining Full-Service Gas Station in the Country

question 69

Multiple Choice

Customers arrive at the one remaining full-service gas station in the country at the rate of 45 per minute and are served by the first available of three pump jockeys who can dole out gas and check oil at the rate of 20 customers per minute. Both service and interarrival times are governed by the exponential distribution. The probability that no pump jockey is busy is 0.0748.
-Use the information in Scenario C.3.What is the average number of customers in the system?

• A) Fewer than or equal to 3.0
• B) Greater than 3.0 but fewer than or equal to 3.5
• C) Greater than 3.5 but fewer than or equal to 4.0
• D) Greater than 4.0

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Definitions:

Final Products

Goods and services that are consumed by the end-user and do not require further processing.

Free and Open Markets

Economic systems where supply and demand are not hindered by undue restrictions, allowing for free trade and competition.

Efficient Level

The point at which a system operates at maximum productivity with minimum waste and expense.

Marginal Cost

The additional cost incurred in producing one more unit of a good or service.