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Question

If the selling price of 10 pens is equal to the cost price of 14 pens, find gain per cent.


Solution

Let the cost of each pen be Rs. 1
CP of 10 pens = Rs. 10
SP of 10 pens = CP of 14 pens = Rs. 14
Gain = SP - CP = 14-10= Rs. 4
Gain% = GainCP × 100% = 410× 100%= 40%

Mathematics
RS Aggarwal (2017)
Standard VII

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