Q7 of 94 Page 142

On selling 100 pens, a man gains the selling price of 20 pens. The gain per cent is

Let × be the CP of pen


SP of 100 pens = 100x


Gain of 20 Pens = 20x


CP = SP - Gain


= 100 × – 20x


= 80x




= 25%

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