Sasha goes to a shop to buy a sofa set and a | vedclass

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(D) Let the cost of the sofa set be $Rs. 100$. Then,the cost of the center table is $Rs. 40$ (since it is $40 \%$ of the sofa set cost).According to t

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$8.1$

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(D) Let the cost of the sofa set be $Rs. 100$. Then,the cost of the center table is $Rs. 40$ (since it is $40 \%$ of the sofa set cost).According to the original agreement,the cost of the center table should be:$= \frac{90}{100} 	imes 40 = Rs. 36$ ($10 \%$ discount on the center table).The cost of the sofa set should be:$= \frac{75}{100} 	imes 100 = Rs. 75$ ($25 \%$ discount on the sofa set).Total expected payment $= 36 + 75 = Rs. 111$.According to the manager,the discount percentages were interchanged:Cost of the center table $= \frac{75}{100} 	imes 40 = Rs. 30$.Cost of the sofa set $= \frac{90}{100} 	imes 100 = Rs. 90$.Total actual payment made $= 30 + 90 = Rs. 120$.Extra money paid $= 120 - 111 = Rs. 9$.Percentage extra paid $= \frac{9}{111} 	imes 100 \approx 8.1 \%$.

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