(0) 0 45. The marked price of an el...
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(0) 0 45. The marked price of an electric iron is 690. The shopkeeper allows a discount of 10% and gains 8%. If no discount is allowed, his gain per cent would be (1) 20% (2) 24% (3) 25% (4) 28%

11th - 12th Class
Maths
Solution
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45. (1)( because mathrm{MP} ) of electric iron ( =₹ 690 ) and discount% ( =10 % ) ( therefore ) SP of electric iron ( =frac{M P times(100-D %)}{100} ) ( =frac{690 times(100-10)}{100}=frac{690 times 90}{100}=₹ 621 ) and Profit% ( =8 % ) ( therefore mathrm{CP} ) of electric iron ( =frac{mathrm{SP} times 100}{(100+text { Profit% })} ) ( =frac{621 times 100}{100+8}=frac{621 times 100}{108}=₹ 575 ) With no discount, profit ( =mathrm{MP}-mathrm{CP} ) ( begin{aligned} &=₹(690-575)=₹ 115 text { Hence, profit% } &=frac{text { Profit }}{mathrm{CP}} times 100 %=frac{115}{575} times 100 % &=20 % end{aligned} )
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