Exhibit 5-15

question 9

Multiple Choice

Exhibit 5-15.A bank manager estimates that an average of two customers enter the tellers' queue every five minutes.Assume that the number of customers that enter the tellers' queue is Poisson-distributed. Refer to Exhibit 5-15.What is the probability that less than two customers enter the queue in a randomly selected five-minute period?

• A)0.1353
• B)0.2707
• C)0.4060
• D)0.6767

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Definitions:

Conduction

The transfer of heat or electricity through a substance, resulting from a difference in temperature or electrical potential.

Wilhelm Roentgen

The German physicist who discovered X-rays in 1895, an achievement for which he was awarded the first Nobel Prize in Physics in 1901.

X-rays

A form of electromagnetic radiation with wavelengths shorter than ultraviolet light, capable of penetrating solids and used in medical imaging.

Discovered

The act of finding or uncovering something that was previously unknown or hidden.