Question

the selling price of 10 pens is equal to cost prize of 11 pens find the gain

Answer 1

let the cost price of 1 pen = Rs 1

then , cost price of 11 pen = 11 ×1 = Rs 11

given ,

selling price of 10 pens = cost price of 11 pens

then ,

selling price of 1 pen = 11 / 10 = Rs 1.1

selling price of 10 pen = 10 × 1.1 = Rs 11

pen remaining to sell= 11 - 10 = 1 pen
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gain = selling price of 1 pen

=1 × 1.1 = Rs 1.1

=>gain = Rs 1.1

gain % = gain / cost price × 100

= 1.1 / 11 × 100 = 10 %

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Your Answer : 10 %
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