Exhibit 5-15

question 37

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 at least two customers enter the queue in a randomly selected five-minute period?

• A)0.1353
• B)0.2707
• C)0.4060
• D)0.5940

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Definitions:

Ecosystems

Communities of living organisms in conjunction with the nonliving components of their environment, interacting as a system.

Pyramid of Biomass

A depiction of the decreasing mass of organisms found as one ascends through the food chain.

Pyramid of Energy

A graphical representation that shows the flow of energy at different trophic levels in an ecosystem, with the largest amount of energy at the base and decreasing amounts as you move up.

Pyramid of Numbers

A graphical representation that shows the number of organisms at each trophic level in an ecosystem.