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anonymous
 one year ago
A survey was conducted among 400 students of age groups 7–12 years and 13–18 years to find their favorite music genre. The students had to select any one genre out of jazz, rock, and pop. Out of the 200 students in the age group 7–12 years who participated in the survey, 142 liked rock or pop music. The total number of students of both age groups who liked jazz was 72.
Using a twoway table, compute the total number of students in the age group 13–18 years who liked rock or pop music.
122
130
142
186
anonymous
 one year ago
A survey was conducted among 400 students of age groups 7–12 years and 13–18 years to find their favorite music genre. The students had to select any one genre out of jazz, rock, and pop. Out of the 200 students in the age group 7–12 years who participated in the survey, 142 liked rock or pop music. The total number of students of both age groups who liked jazz was 72. Using a twoway table, compute the total number of students in the age group 13–18 years who liked rock or pop music. 122 130 142 186

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Vocaloid
 one year ago
Best ResponseYou've already chosen the best response.1whoops, small correction, the circled value should be this onedw:1438208408869:dw

Vocaloid
 one year ago
Best ResponseYou've already chosen the best response.1anyway, the first row tells us that (number of kids aged 712 who like jazz) + (number of kids aged 712 who like rock or pop) = 200 find the number of kids aged 712 who like jazz

Vocaloid
 one year ago
Best ResponseYou've already chosen the best response.1dw:1438208711189:dw I have to get going, but maybe this will help explain it a bit better?

Vocaloid
 one year ago
Best ResponseYou've already chosen the best response.1A + 142 = 200 A + B = 72 B + C = D 200 + D = 400 the value we want to find is C

Vocaloid
 one year ago
Best ResponseYou've already chosen the best response.1first find A, then B, then D, and then you can use that information to find C

LynFran
 one year ago
Best ResponseYou've already chosen the best response.2good explanation @Vocaloid

LynFran
 one year ago
Best ResponseYou've already chosen the best response.2to find A A+142=200 A=200142 A=?

LynFran
 one year ago
Best ResponseYou've already chosen the best response.2good now A+B=72 A=58 so 58+B=72 B=7258

LynFran
 one year ago
Best ResponseYou've already chosen the best response.2good B+C= D lets look at the last equation 200+D=400 D=400200 D=?

LynFran
 one year ago
Best ResponseYou've already chosen the best response.2good now B+C=D and B=14 and D=200 so 14+C=200 c=20014 c=??

LynFran
 one year ago
Best ResponseYou've already chosen the best response.2welcome thanks to @Vocaloid
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