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posted by tina on Wednesday, June 26, 2013 at 4:14am.
if oranges are bought at the rate of 11 for rupees 10 and are sold at the rate of 10 for rupees 11 , find his profit percent.
profit based on cost is (s-c)/c (11/10 - 10/11)/(10/11) = 21/100 = 21%
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