A vendor bought Headphones at 5 for Rs 100.How many for Rs 100 must he sell to gain 50%? Choose the most appropriate option.
A) 8
B) 3
C) 5
D) 6
E) None
C.P. of 9 Headphones= Rs100   S.P. of 9 Headphones = 150% of Rs 100 = Rs150   For Rs.150 , Headphones sold = 9.   For Rs. 100,Pens sold=(9/150)*100= 
<gadget id="calculator">(9/150)*100</gadget>
<output>6</output>
6   Answer: Option 6
<result>D</result>
A vendor bought Headphones at 5 for Rs 100.How many for Rs 100 must he sell to gain 50%?