SSC CHSL Model Paper 10

Question : 8 of 100

Marks: +1, -0

In a class there are 18 boys who are over 160 cm tall. If these constitute three fourths of the boys and the total number of boys is two-thirds of the total number of students in the class, what is the number of girls in the class?

Validate

Solution:

Let the number of boys be x.
Then,

3/4x = 18

⇒ x = 18 ×4/3 = 24

If total number of students is y, then

2/3 y = 24

⇒ y = 24 × 3/2 = 36

Therefore, number of girls in the class

= 36- 24 = 12

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