A shop owner professes to sell his articles at certain cost price but he uses false weights with which he cheats by 50% while buying and by 10% while selling. What is his percentage profit?
Choices
A) 10.22%
B) 20.22%
C) 21.22%
D) 50%
E) Can't be calculated
The owner buys 100kg but actually gets 150kg;   The owner sells 100kg but actually gives 90kg;   Profit: (150-90)/90*100=50%   Answer: 50%.
<result>D</result>
A shop owner professes to sell his articles at certain cost price but he uses false weights with which he cheats by 50% while buying and by 10% while selling. What is his percentage profit?