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 to nearest tenth) $$\begin{array} { | l | l | } \hline \text { Class } & \text { Frequency } ( f ) \\\hline 200 \text { to } 249 & 3 \\\hline 250 \text { to } 299 & 1 \\\hline 300 \text { to } 349 & 1 \\\hline 350 \text { to } 399 & 3 \\\hline 400 \text { to } 449 & 1 \\\hline 450 \text { to } 499 & 3 \\\hline\end{array}$$

A) 353.7
B) 286.5
C) 253.7
D) 250.0