Find the Mean of the Data Summarized in the Given

Multiple Choice

Find the mean of the data summarized in the given frequency distribution.
-The test scores of 40 students are summarized in the frequency distribution below. Find the mean score.
$$\begin{array} { c | c } \text { Score } & \text { Students } \\\hline 50 - 59 & 6 \\60 - 69 & 5 \\70 - 79 & 6 \\80 - 89 & 11 \\90 - 99 & 12\end{array}$$

A) 71.1
B) 79.0
C) 74.5
D) 75.1