The population of a town increases by 10% in the first year and decreases by 10% in the second year. If the present population is 19800, what was it 2 years ago? MCQ with Answer and Explanation
The population of a town increases by 10% in the first year and decreases by 10% in the second year. If the present population is 19800, what was it 2 years ago?
A. 18000
B. 20000
C. 21000
D. 19000
Answer: Option B
Solution (By JKSSB Mock Tests)
Present = original × 1.1 × 0.9 = 0.99 original. So original = 19800/0.99 = 20000.
In an election, 20% of the votes were declared invalid. The winner got 70% of the valid votes and won by 1600 votes. Find the total number of votes polled.
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