For the Following Frequency Distribution of Exam Scores,how Many Students $$\begin{array} { l l } X & \mathrm { f } \\\hline 90 - 94 & 3 \\85 - 89 & 4 \\80 - 84 & 5 \\75 - 79 & 2 \\70 - 74 & 1\end{array}$$

Multiple Choice

For the following frequency distribution of exam scores,how many students had scores lower than X = 80? $$\begin{array} { l l } X & \mathrm { f } \\\hline 90 - 94 & 3 \\85 - 89 & 4 \\80 - 84 & 5 \\75 - 79 & 2 \\70 - 74 & 1\end{array}$$

A) 2
B) 3
C) 7
D) Cannot be determined