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31 vote

The population of a village decreases at the rate of 20% per annum. If its population 2 years ago was 10,000 , the present population is

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The population of a village decreases at the rate of 20% per annum. If its population 2 years ago was 10,000 , the present population is
1). 4600
2). 6400
3). 7600
4). 6000

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2 answers

24 vote
Answered by on | Votes 24 |
Answer for this question is option 2

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38 vote
Answered by on | Votes 38 |

.= 10000 ($1-\frac{(20)^{2}}{100}$)

= $10000\times\frac{4}{5}\times\frac{4}{5}$

=  6400




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