The population of a town is $20, 000$ . If the annual birth rate of is $4 %$ and annual death rate is $2 %$ calculate the population after two years.

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Solution

Annual birth rate is $4 %$
Annual death rate is $2 %$
Net $= + 2 %$
Population after $2$ years $= (1 + 0.02)^{2} \times 20000 = 20808$

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