High school students from grades 9–10 and 11–12 were asked to choose the kind of band to have play at a school dance: rap, rock, or country.

Their choices were as follows:
Grades 9–10—Rap: 40; Rock: 30; Country: 55
Grades 11–12—Rap: 60; Rock: 25; Country: 35

Which of the following is a correct two-way frequency table for the data?


Band Preference for School Dance
Rap Rock Country Row totals
Grades 9–10 0.28 0.21 0.38 0.86
Grades 11–12 0.41 0.17 0.24 0.83
Column totals 0.69 0.38 0.62 1

Band Preference for School Dance
Rap Rock Country Row totals
Grades 9–10 0.40 0.55 0.61 0.86
Grades 11–12 0.60 0.45 0.39 0.83
Column totals 1 1 1 1

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

Band Preference for School Dance
Rap Rock Country Row totals
Grades 9–10 0.32 0.24 0.44 1
Grades 11–12 0.50 0.21 0.29 1
Column totals 0.69 0.38 0.62 1