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 heights of a group of professional basketball players are summarized in the frequency distribution below. Find the mean height. Round your answer to one decimal place. $$\begin{array} { r | r } \text { Height (in.) } & \text { Frequency } \\\hline 70 - 71 & 2 \\72 - 73 & 4 \\74 - 75 & 12 \\76 - 77 & 9 \\78 - 79 & 10 \\80 - 81 & 7 \\82 - 83 & 1\end{array}$$

A) 74.9 in.
B) 78.3 in.
C) 76.5 in.
D) 13.5 in.