1.

A man purchased 150 pens at the rate of $ 12 per pen. He sold 50 pens at a gain of 10%. The percentage gain at which he must sell the remaining pens so as to gain 15% on the whole outlay is

A. <table><tr><td rowspan="2">21</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2">%</td></tr><td align="center">2</td></table>
B. 20%
C. 17%
D. <table><tr><td rowspan="2">17</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2">%</td></tr><td align="center">2</td></table>
Answer» E.


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