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                                    A shopkeeper claims to sell his articles at a discount of 10%, but marks his articles by increasing the cost of each by 20%. His gain per cent is (a) 6% (b) 8% (c) 10% (d) 12% | 
                            
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Answer»  (b) 8% Let C.P. = Rs 100. Then M.P. = Rs 120 Discount = 10% \(\therefore\) S.P. = 90% of Rs 120 = \(\frac{90}{100}\) x Rs 120 = Rs 108 \(\therefore\) Gain % = 8%  | 
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