GATE CE 2019 Set 2 — Question 7
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General Aptitude → Quantitative Aptitude → Ratios, Percentages, Powers, Exponents & Logarithms
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Question
Population of state X increased by x% and the population of state Y increased by y% from 2001 to 2011. Assume that x is greater than y. Let P be the ratio of the population of state X to state Y in a given year. The percentage increase in P from 2001 to 2011 is __________.
Correct answer
(D) (100(x-y))/(100+y)
Solution
To find the percentage increase in the ratio from 2001 to 2011, we define the populations of states X and Y in both years.Let:
- and be the populations of state X and state Y in 2001, respectively.
- and be the populations of state X and state Y in 2011, respectively.
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