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Q: The population of a town increases 5% annually but decrease by emigration by ¼%. What is the net increase in 3 years?
A. 14.93% B. 19.43%
C. 10.93% D. 12.53%

Answer and Explanation

Answer:14.93%

Explanation:
Let the original population be 100
Net annual increase = (5 – 1/4) = 19/4%
Therefore the population in 3 years = 100 * (1 + 19 /400)3 =100*(419/400)3=114.93
∴increase = 114.93 – 100 = 14.93%

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