When a Mobile is sold for Rs. 7200, the owner loses 20%. At what price must that Mobile be sold in order to gain 20%? Choose the correct choice from the following answers.
A) 10,400
B) 10,600
C) 10,800
D) 11,000
E) 11,200
80 : 7200 = 120 : x   x = (7200 x 120)/80 = 10800.   Hence, S.P. = Rs. 10,800.   Answer: Option 10,800
<result>C</result>
When a Mobile is sold for Rs. 7200, the owner loses 20%. At what price must that Mobile be sold in order to gain 20%?