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A shopkeeeper gained rs 8 by selling a pem allowing 10% doscount .he would have gained rs.20 if tje discount was not allowed . wjat was the selling price of the pen |
Answer» Answer:-Let the marked price be X When the shopkeeper is SELLING for x, his GAIN is Rs. 20 Cost price = Marked price-Gain = x - 20 -------------(I) After discount: Discount=10% Marked price after discount=(100-10%) of x = 90% of x =0.9*x =0.9x When the shopkeeper is selling for 0.9x, his gain = Rs. 8 Cost price= Marked price-gain = 0.9-8 ----------------(II) From (I) and (II) x-20=0.9x-8 x=0.9x-8+20 x=0.9x+12 x-0.9x=12 0.1x=12 x=12/0.1 x=120 Marked price of pen = Rs. 120 Cost price=Rs. (120-20) Cost price=Rs. 100 @BengaliBeautyFeel free to ask your doubts ANYTIME |
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