In a class, the ratio of the number of boys to that of the girls is 11 ∶ 9. 30% of the boys and 20% of the girls passed an exam. Find the percentage of students who passed the exam.
Answer & explanation
Correct answer: option 4
according to question ,
ratio of , Boys : Girls
11 : 9
Let Number of Boys = 110 & Number of Girls = 90
Number of Passed Boys = 30% of 110 = 33
Number of Passed Girls = 20% of 90 = 18
Percentage of passed students = \(\frac{33+18}{200}\) × 100
= \(\frac{51}{200}\) × 100
= 25.5%