The selling price of 8 shirts is equal to the purchase price of 10 shirts . What is the profit margin ?

A 15%
B 20%
C 25%
D Not possible to find out

Correct Answer: 25%

CP of 10 shirts = SP of 8 shirts Let the CP of 1 shirt be Tk. x CP of 10 shirts = 10x SP of 8 shirts = 10x SP of 1 shirt     = 10x/8 Profit                 = SP - CP                         = (10x/8) - x                         = 2x/8 The profit margin = (Profit/ CP) *100                         = {(2x/8)/x}*100                         = 25%
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