RRB Group D Model Paper 7 with solutions

Question : 47 of 100

Marks: +1, -0

The average age of a class is 15.8 years. The average age of the boys in the class is 16.4 years while that of the girls is 15.4 years. The ratio of boys to girls in the class is

3 : 4
2 : 3
1 : 2
3 : 5

Validate

Solution:

(2) Let the number of boys and girls be x and y respectively.

Ratio of number of boys to girls
=

x/y=0.4/0.6=2/3

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