If the cost price of 22 pens is equal to the selling price of 20 pens, the gain percent is: Pick:
A) 9%
B) 26%
C) 50%
D) 80%
E) 10%
Solution :   Let cost price of the price be Rs.1   20 pens C.P. = 20   22 pens S.P. = 22   Gain = 2/20*100= 
<gadget id="calculator">2/20*100</gadget>
<output>10</output>
10 %   Answer :10%
<result>E</result>
If the cost price of 22 pens is equal to the selling price of 20 pens, the gain percent is: