
If the discount of 10% is given on the marked price of a radio, the gain is 20%. If the discount is increased to 20%, the gain percent is :

 5%

6 1 % 4 
6 2 % 3 
7 5 % 8
Correct Option: C
Let the C.P. of article be Rs. 100 and the marked price be Rs. q.
Case I
=  = 120  
100 
⇒ q =  
90 
Marked price q = Rs.  
3 
Case II
S.P. =  = Rs.  
100  5 
= Rs.  ×  = Rs.  
5  3  3 
∴ Profit = Rs.  − 100  
3 
Profit = Rs.  
3 
Profit = Rs.  
3 
∴ Profit percent =  %  
3 
Profit percent = 6  %  
3 