Calculate the Mean of the Grouped Data from the Given

Multiple Choice

Calculate the mean of the grouped data from the given frequency distribution. (Round your answer to the nearest tenth) $$\begin{array} { | l | l | } \hline \text { Class } & \text { Frequency } ( f ) \\\hline 300 \text { to } 399 & 2 \\\hline 400 \text { to } 499 & 1 \\\hline 500 \text { to } 599 & 4 \\\hline 600 \text { to } 699 & 3 \\\hline 700 \text { to } 799 & 1 \\\hline\end{array}$$

A) 225.3
B) 549.5
C) 272.3
D) 449.5