The Manager of a Bank Recorded the Amount of Time

question 105

Multiple Choice

The manager of a bank recorded the amount of time each customer spent waiting in line during peak business hours one Monday. The frequency table below summarizes the results. $$\begin{array} { | l | l | } \hline \begin{array} { l } \text { Waiting Time } \\\text { (minutes) }\end{array} & \begin{array} { l } \text { Number of } \\\text { Customers }\end{array} \\\hline 0 - 3 & 9 \\\hline 4 - 7 & 10 \\\hline 8 - 11 & 12 \\\hline 12 - 15 & 4 \\\hline 16 - 19 & 4 \\\hline 20 - 23 & 2 \\\hline 24 - 27 & 2 \\\hline\end{array}$$ If we randomly select one of the customers represented in the table, what is the probability that the waiting time is at
Least 12 minutes or between 8 and 15 minutes?

• A) 0.727
• B) 0.093
• C) 0.651
• D) 0.558

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Definitions:

Transportation

The movement of people, goods, or services from one location to another, involving a variety of modes such as road, rail, air, and sea.

Agriculture

The practice of cultivating soil, growing crops, and raising livestock for food, fiber, and other products.

Mining

The process of extracting minerals or other geological materials from the earth, typically from an ore body, lode, vein, seam, or reef.

Unionization Rates

The proportion of a workforce that is members of a union or labor organization.