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A dishonest shopkeeper makes cheating of 10% at the time of buying and 10% at the time of selling the goods. Find profit percent.

A dishonest shopkeeper makes cheating of 10% at the time of buying and 10% at the time of selling the goods. Find profit percent.
1). 0%
2). 10%
3). 20%
4). 21%

This Question has 1 answers.

Let cost price of 1 gm goods = Rs. 1

Letthe shopkeeper purchases 100 gm goods. 

Total cost price = Rs. 100

Due to cheating he actually gets = 100 + (10/100) × 100 = 110 gm goods.

Due to cheating at the time of selling the goods, he sells = 110 + 110× (10/100) = 121 gm goods

Total selling price = Rs. 121

Required profit percentage = (121 – 100)/100 × 100 = 21%

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