The population of a village decreases at the rate of 20% per annum. If its population 2 years ago was 10000, the present population is :
The population of a village decreases at the rate of 20% per annum. If its population 2 years ago was 10000, the present population is :
[A]4600
[B]6000
[C]6400
[D]7600
6400
Present Population
$latex = 10000\left ( 1-\frac{20}{100} \right )^{2}&s=1$
$latex = 10000\times \frac{4}{5}\times \frac{4}{5} = 6400&s=1$
Hence option [C] is correct answer.