Estimate the Mean Exam Score for the 50 Students in Prof

Multiple Choice

Estimate the mean exam score for the 50 students in Prof. Axolotl's class. $$\begin{array} { c r } \text { Score } & f \\40 \text { but less than } 50 & 6 \\50 \text { but less than } 60 & 18 \\60 \text { but less than } 70 & 14 \\70 \text { but less than } 80 & 9 \\80 \text { but less than } 90 & 3 \\\text { Total } & 50\end{array}$$

A) 59.2
B) 62.0
C) 63.5
D) 64.1