The percentage of the students that like country and also in grades 9-10 is 61%
Explanation:
Rap Rock Country Total
Grades 9-10 40 30 55 125
Grades 11-12 60 25 35 120
Total 100 55 90 245
Percentage= (Number of students in both country and grades/ Total students in country)*100
Total students in country= 90
Number of students in both country and grades 9-10= 55
Percentage= (55/90)*100
= 61.11%= 61%(rounded to the nearest whole %)