Q:

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 totalsGrades 9–10 40 30 55 125Grades 11–12 60 25 35 120Column totals 100 55 90 245a. 10%b. 21%c. 25%d. 45%

Accepted Solution

A:
Answer:d. 45%Step-by-step explanation:In total there are 30 + 25 = 55 students in total that like rock. From these there are 25 who are in grades 11-12. This makes that (25/55) * 100% = 45.45% of the students that like rock are in grades 11-12.