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Questions  >>  Olympiad-Math  >>  Class 6  >>  Math  >>  Percentages
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Q)

The population of a town increases by 10% per annum for two years then decreases by 10% per annum for the next two years, if the population of the town four year ago was 10000, what would it be today?


( A ) 9801
( B ) 9000
( C ) 10100
( D ) 9500

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A)
I don't know how to do
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