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Question
A man buys pen at the rate of TK. 420 per 100 pieces and sells them at TK. 60 per dozen . If the profit is TK. 100, how many pens did he buy ?
100
125
150
160
None of these
ANSWER : 2
Descrption
<p style="margin-left:0px;">The cost price of 100 pens = TK. 420 Cost price of 1 pen = TK. (420/100) = TK. 4.2 Selling price of 1 dozen pens = TK. 60 Selling price of 1 pen = TK. (60/12) = TK. 5</p><p style="margin-left:0px;">Profit per pen = Selling price per pen - Cost price per pen = TK. (5 - 4.2) = TK. 0.8</p><p style="margin-left:0px;">Let the number of pens bought be x Total profit = TK. 100</p><p style="margin-left:0px;">Profit per pen × number of pens = Total profit TK. 0.8 × x = TK. 100 x = (TK. 100)/(TK. 0.8) = 125</p><p style="margin-left:0px;">Therefore, the man bought 125 pens.</p>
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