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1. A dishonest shopkeeper, at the time of selling and purchasing, weighs 10% less and 20% more per kilogram respectively. Find the percentage profit earned by treachery. (Assuming he sells at Cost Price)

A. 30%

B. 20%

C. 25%

D. 33.33%

Solution:

While purchasing he would take 1200 grams for the price of 1000 grams. While selling he would sell 900 grams for the price of 1000 grams.
Since, CP = SP
The profit earned by him,

\frac{Goods Left}{Goods Sold} = \frac{300 \times 100}{900} =

33.33 %

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