Question

The Population of a village decreases by 5% per annum . if the population at present is 3610 then what was the population 2 year before??


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Answer 1

Let the population 2 years back be x

Then,

3610=x(1-5/100)^2

3610=x(19/20)^2

3610=x (0.9025)

3610/0.9025=x

4000=x ans