SSC CGL Tier II 12 Apr 2015 Paper

Question : 87 of 100

Marks: +1, -0

From 1980-1990, the population of a country increased by 20%.
From 1990-2000, the population of the country increased by 20%.
From 2000-2010, the population of the country increased by 20%.
Then the overall increased population (in percentage) of the country from 1980-2010 was

72.2 %
60 %
72.8 %
62.8 %

Validate

Solution:

(3) Single equivalent increase for 20% and 20%

= (20+20+ {20×20}/{100} ) \%

=44 \%

Single equivalent increase for 44% and 20%

= (44+20+ {44 ×20}/{100} ) \%

=(64+8.8) \%=72.8 \%

Go to Question:

Prev Question

Next Question