Arithmetichard · Past Paper
The population of a town increases by 10% in first year and decreases by 10% in second year. If population after 2 years is 19800, find original population.
A20000
B19000
C21000
D20500
✓ Correct Answer: A — 20000
Net change = -1%. 99% of x = 19800 => x = 19800 / 0.99 = 20000.
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