RBI Assistant Model Paper 2

Let the population of village be x.
Population of higher economic class
=

30x

100

=

3x

10

Population of lower economic class = 6860
∴ Population of middle economic class
=

3

2

×6860
= 10290
∴ Population of middle and lower economic class
= 6860+10290 = 17150
∴ (x−

3x

10

) =

7x

10

= 17150
⇒ x =

17150×10

7

= 24500