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

---

Definitions:

Biology

The scientific study of life and living organisms, including their structure, function, growth, evolution, and distribution.

Synapse

The tiny gap between the axon of one neuron and the dendrite of another.

Fontanels

Soft spots on a baby's skull where the bones have not yet fused together, allowing the head to be more flexible during birth and continuing to grow during early childhood.

Pediatrician

A medical doctor specializing in the care, diagnosis, and treatment of children’s diseases and conditions from infancy through adolescence.