Ratio and Proportion Practice Test 3

Ratio of number of boys and girls in the school = 3x : 2x
Number of boys in the school = $\frac{3}{55}\times 100$ = 60 boys
Number of girls in the school $=\frac{2}{5}\times 100$ = 40 girls
Total students = 100
Scholarship holder boys = 20%
Number of scholarship holder boys $=\frac{60\times 20}{100}$ = 12 boys
Scholarship holder girls = 25%
Number of scholarship holder girls = 25% of 40 $=\frac{25\times 40}{100}$ = 10 girls
Students who do not get scholarship
= Total students - (Scholarship holder boys and girls)
= 100 - (12 + 10) = 100 - 22 = 78 students