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Q.

The population of a town increases at 10% per annum. If the present population is 13310. Find its population 3 years ago.

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a

14000

b

10000

c

11000

d

11500

answer is B.

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Detailed Solution

$x \times \frac{110}{100} \times \frac{110}{100} \times \frac{110}{100} = 13310$

$x = 13310 \times \frac{1000}{1331} = 10000$

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