A merchant bought 15 dozen pens at 10 per dozen. He sold them at * 1.50 each. Find his profit or loss per cent,
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A merchant bought 15 dozen pens at 10 per dozen. He sold them at * 1.50 each. Find his profit or loss per cent,
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he has 15 dozen so cost = 150
he sold each at 1.50 so selling price per dozen
= 18 per dozen
15 dozen selling price = 270
profit = 270 - 150 = 120