jmc

The grading scale shown is used at Jones Junior High. The fifteen scores in Mr. Freeman's class were: \begin{array}[t]{lllllllll} 89, & 72, & 54, & 97, & 77, & 92, & 85, & 74, & 75, \\ 63, & 84, & 78, & 71, & 80, & 90. & & & \\ \end{array} In Mr. Freeman's class, what percent of the students received a grade of C? \boxed{\begin{array}[t]{cc} A: & 93 - 100 \\ B: & 85 - 92 \\ C: & 75 - 84 \\ D: & 70 - 74 \\ F: & 0 - 69 \end{array}}