Find the Mean for the Given Frequency Distribution $\begin{array}{c|r}\text { Score } & \text { Frequency } \\\hline 60-69 & 3 \\70-79 & 12 \\80-89 & 7 \\90-99 & 2\end{array}$

Multiple Choice

Find the mean for the given frequency distribution.
-Find the approximate mean for the grouped frequency distribution. Use the class midpoint to represent each class. Round your answer to two decimal places.
$\begin{array}{c|r}\text { Score } & \text { Frequency } \\\hline 60-69 & 3 \\70-79 & 12 \\80-89 & 7 \\90-99 & 2\end{array}$

A) $79.50$
B) $74.50$
C) $78.12$
D) $77.83$