The Frequency Distribution Below Summarizes Employee Years of Service for Alpha

Multiple Choice

The frequency distribution below summarizes employee years of service for Alpha Corporation. Find the class midpoint for class 1-5. $$\begin{array} { c | c } \text { Years of service } & \text { Frequency } \\\hline 1 - 5 & 5 \\6 - 10 & 20 \\11 - 15 & 25 \\16 - 20 & 10 \\21 - 25 & 5 \\26 - 30 & 3\end{array}$$

A) 5.0
B) 2.5
C) 3.0
D) 3.5