The total number of students in class 3 is what percent of the total number of students in the schoo...........

Quantitative Aptitude ( CCS) Case Studies

Directions : Study the following carefully and answer the questions that follow:
A school has a total of 3000 students in 5 different classes as 1, 2, 3, 4, and 5. The ratio of boys to girls in the school is 4 : 2 respectively. 14% of the boys are in class 1. 20% of the girls are in class 5. The ratio of boys to girls in class 1 is 4 : 6 respectively. One-eighth of the girls are in class 3. 44% of the boys are in class 4. Number of girls in class 4 is 20% of the boys in the same class. The reaming girls are in class 2. The total number of students in class 3 is 345. 24% of the boys are in class 2 and the remaining boys are in class 5.

The total number of students in class 3 is what percent of the total number of students in the school?

12.0%

12.5%

11.5%

13.2%

15.5%

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Explanation:

Class 1 – B(280) G(420)
Class 2 – B(480) G(79)
Class 3 – B(220) G(125)
Class 4 – B(880) G(176)
Class 5 – B(140) G(200)
So req % = (220+125)/3000 * 100 = 11.5%