The Manager of a Bank Recorded the Amount of Time

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) $0.558$
B) $0.651$
C) $0.093$
D) $0.727$