UPSC CDS 1 2022 Math Paper

Given:- Total number of people below the age of 40=10.5 lakhs
Formula Used:
Percentage =( Value ∕ Total Value )×100
Calculation:
Total taxpayers of the age group below 30 years =14%
% of persons below the age of 40=14+29.75+26.25=70%
According to the question,
70% of total people =10.5
⇒1%=‌

10.5

70

×100
⇒1%=15‌ thousand ‌
So, the total taxpayers in the age group below 30 years in 14%
⇒14×15000=2,10,000
Since ratio of taxpayers and non-payers in this group is 1:2
⇒ Number of taxpayers =2.1×‌

1

3

=0.7
⇒ Total number of taxpayers in that age group is 0.7 (in lakhs).