SSC CPO SI and ASI 2015 Paper

Question : 141 of 199

Marks: +1, -0

The ratio of the number of boys to that of girls in a village is 3 : 2. If 30% of boys and 70% of girls appeared in an examination, the ratio of the total number of boys and girls who appeared in the examination to those who did not appear in the same examination is

9 : 14
23 : 27
1 : 1
27 : 23

Validate

Solution:

(2) Let the number of boys and girlsbe 3a and 2a, then
Villagers who appeared in the examination

= {3 a × 30}/{100}+\ {2 a × 70}/{100}=\ {23 a}/{10}

Villagers who did not appear in theexamination

=\ {3 a× 70}/{100}+\ {2 a × 30}/{100}= {27 a}/{10}

Ratio

= {23 a}/{10} : \ {27 a}/{10}=23 : 27

Go to Question:

Prev Question

Next Question