Question

Total number of students in 4 different schools and percentage of students participating in Dance and play in 4 different classes:
Q. If 20% of students who participate in dance from class VI also participate in play then find the ratio of student from class VI who participated only in dance to students participated only in play?

• A. 12:5
• B. 16:25
• C. 19:20
• D. 20:19
• E. 15:11

Answer 1

The correct option is A

12:5

Students who participate only in dance from class VI:
$=(\frac{15}{100}\times )-(\frac{20}{100}\times \frac{15}{100}\times 500)=60$
Student who participate only in play from class VI
$=\frac{8}{100}\times 500-15=25$
Ratio = 60:25 = 12:5