frequency distribution

The following grouped frequency distribution gives the scores on a test for a class of 60 students. Scores 50-59 60-69 70-79 80-89 90-99 Number of In CO LO N students What is the relative frequency of the 70-79 score group? O a. 50% O b. 25% O c. 15% O d. 4% O e. 74.5%