Question

a dishonest trader defrauds 20% in buying and 20%in selling what percent does he gain?
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Answer 1

Answer:

He extent 10% in buying i.e. 10g on buying and 10% in selling in good, that is he sells 91g instead 100.

So, Gain = 19

% gain = (19 *100)/90 = 21g (approx.)

Step-by-step explanation:

Hope it helps you dear..

Answer 2

Answer:

40%

20%+20%-40%. he frauds 20 on buying and 20on selling