The Number of Phone Calls Coming into a Switchboard in the Next

question 25

Multiple Choice

The number of phone calls coming into a switchboard in the next five minutes will either be 0, 1, 2, 3, 4, 5, or 6.The probabilities are the same for each of these (1/7) .If X is the number of calls arriving in a five-minute time period, what is the mean of X?

• A)2
• B)3
• C)4
• D)5

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Definitions:

National Guard

A reserve military force composed of state National Guard militia units, which operates under state and federal law, and is under the dual control of the state and the federal government.

Great Railroad Strike

A major labor strike in 1877 that began in the United States and quickly spread to multiple parts of the country, affecting many railroads and the broader economy.

Haymarket Riot

An 1886 labor protest in Chicago that turned violent, marking an important event in the history of labor movements in the United States.

Judicial System

The system of courts that interprets and applies the law in the name of the state or country, providing a mechanism for the resolution of disputes.