Mathematics, 08.07.2019 02:10 uglybruja81

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%

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Given the frequency table, what percentage of the students that like rock are also in grades 11–12?...