For a Single Server, Single Queue System with an Arrival

question 60

Multiple Choice

For a single server, single queue system with an arrival rate of 12 customers per hour and a service rate of 20 customers per hour, what is the mean number of customers in the system (to two decimal places) ?

• A) 0.90
• B) 0.60
• C) 1.50
• D) Cannot be determined from the information given

---

Definitions:

Rate of Return

The increase or decrease in value of an investment over a set period, depicted as a percentage of the investment's starting cost.

Variance

A statistical measure that represents the dispersion of a set of data points or investment returns around their mean, indicating their spread or risk.

Indifference Curve

An indifference curve represents a graphical depiction of different bundles of goods between which a consumer is indifferent, reflecting their preferences for those goods' combinations.

Mean-Standard Deviation Graph

A graphical representation used in finance to show the risk (standard deviation) and return (mean) of different investments.