Question:A dealer marks his goods  20% above cost price. He then allows some discount on it and makes a profit of 8%. The rate of discount is : 

A 4% 
B 6% 
C 10% 
D 12% 

+ Answer
C 

+ Explanation
Let C.P be Rs. 100. Then, M.P = Rs. 120

Also, S.P = Rs. 108

Discount on 120 = Rs. (120 - 108)

              Rs. = 12

Discount on `100 = ((12)/(120) xx 100)`

                    `= 10%`

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