GATE CE 2014 Set 1 — Question 9
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General Aptitude → Quantitative Aptitude → Ratios, Percentages, Powers, Exponents & Logarithms
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Question
One percent of the people of country X are taller than 6 ft. Two percent of the people of country Y are taller than 6 ft. There are thrice as many people in country X as in country Y. Taking both countries together, what is the percentage of people taller than 6 ft?
Correct answer
(D) 1.25
Solution
Let the population of country Y be . Then the population of country X is .
Total population .
Number of people taller than 6 ft in X .
Number of people taller than 6 ft in Y .
Total number of people taller than 6 ft .
Overall percentage .
Total population .
Number of people taller than 6 ft in X .
Number of people taller than 6 ft in Y .
Total number of people taller than 6 ft .
Overall percentage .
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