RRB Non Technical Model Papers 6 with solutions

Question : 69 of 100

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 girls be 3 a and 2a, then
Villagers who appeared in the examination

= {3a ×30}/100+{ 2a ×70} /100=23a/10

Villagers who did not appear in the examination

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

Ratio

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

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