The Average Length of Time That a Customer Waits in Line

question 81

Multiple Choice

The average length of time that a customer waits in line for service is $W ( x , y ) = \frac { 1 } { x - y } , x > y$ where $y$ is the average arrival rate, written as the number of customers per unit of time, and $x$ is the average service rate, written in the same units. Evaluate $W ( 18,6 ) .$ Note: $x$ and $y$ are given as the number of customers per hour.

• A) \(7 \mathrm {~min}\)
• B) \(5 \mathrm {~min}\)
• C) \(3 \mathrm {~min}\)
• D) \(4 \mathrm {~min}\)
• E) \(6 \mathrm {~min}\)

---

Definitions:

Somatic Delusion

A false belief about one's body, including its functions or appearance, that is unfounded and persistent.

Referential Delusion

A false belief that events, objects, or other people in one's environment have a particular and unusual significance to oneself.

Weather Control

The act of manipulating or altering certain aspects of the environment to change the weather, often considered speculative or theoretical.

Auditory Hallucinations

The experience of hearing sounds like voices that do not actually exist. A common symptom of schizophrenia.