The population of a village is 9,000. If the annual birth rate is 12.5% and the annual death rate is 2.5%, calculate the population after three years.
Answer & explanation
Correct answer: option 2
Net Percentage change per year = 12.5% - 2.5% = 10%
Population of village after 3 years ,
= \(\frac{100+10}{100}\) × \(\frac{100+10}{100}\) × \(\frac{100+10}{100}\) × 9000
= \(\frac{11}{10}\) × \(\frac{11}{10}\) × \(\frac{11}{10}\) × 9000
= 11979
So , population of village after 3 years is 11979.