The price of a commodity decreased by 10% each year. If the present price is Rs. 1000. Then the % decrease in price after 3 years is:

The price of a commodity decreased by 10% each year. If the present price is Rs. 1000. Then the % decrease in price after 3 years is:
1). 19%
2). 21.7%
3). 27.1 %
4). 30%

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