Determine Whether the Events Are Mutually Exclusive If We Randomly Select One of the Customers Represented in a Bank

Determine whether the events are mutually exclusive.
-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. $$\begin{array}{l}\begin{array} { r | r } \text { Waiting Time}&\text{Number of }\\\text { (minutes) }&\text{ Customers } \\\hline 0 - 3 & 13 \\4 - 7 & 10 \\8 - 11 & 11 \\12 - 15 & 5 \\16 - 19 & 4 \\20 - 23 & 2 \\24 - 27 & 3\end{array}\end{array}$$ 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) 0.104
C) 0.521
D) 0.625