1.

Joy bought pens at 120 a dozen. He sold it for 15 each. What is his profit percent?

Answer» <p>Cost of 12 pens(a dozen) = 120selling price of 1 pen = 15selling price of 12 pens = 12*15 = 180</p><p>profit = sp - cp = 180 - 120 = 60profit % = profit / cp * 100= 60/120*100= 50%</p>


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