Given the frequency table, what percentage of the students that like rock are also in grades 11-12? Round to the nearest whole percent.
Band Preference for School Dance
Rap Rock Country Row totals
Grades 9-10 40 30 55 125
Grades 11-12 60 25 35 120
Column totals 100 55 90 245
a. 10%
b. 21%
c. 25%
d. 45%
+2
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