In a school, 4/9 of the number of students are girls and the rest are boys. 3/5 of the number of boys are below 12 years of age and 5/12 of the number of the girls are 12 years or above 12 years of age. If the number of students below 12 years of age is 480, then 5/18 of the total number of students in the school will be equal to ?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 ie 225.
G : B
4 : 5 [Given: (girls/boys) = 4/5 ]
[(7/12) × 4] : [(3/5) × 5]
7/3 : 3 [Age below 12]
7 : 9
16 parts = 480
1 part = 480/16 = 30
= (5/18) × 27 × 30
= 225