By selling 22 pens for a rupee a woman loses 10%. How many for a rupee should he sell in order to gain 50%?	Choose the correct choice:
A) 12 B) 14 C) 45 D) 13 E) 65
13   90% --- 22   150% --- ?   90/150 * 22 = 13
<result>D</result>
By selling 22 pens for a rupee a woman loses 10%. How many for a rupee should he sell in order to gain 50%?