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.

11979

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.