Question:A trader allows a trade discount of 20% and a cash discount of `6 1/4%` on the marked price of the goods and gets a net gain of 20% on the cost. By how much above the cost should  the goods be marked for sale ? 

A 40% 
B 50% 
C 60% 
D 70% 

+ Answer
C 

+ Explanation
Let the C.P. be Rs. 100 and marked price be (100 + x)

S.P` = (100 - 25/4)/100 of 80/100 xx (100 - x)`

     `= 15/16 of 4/5 (100 + x)`

    `= 3/4 (100 + x)`

   `:. 3/4 (100 + x) = 120 => x = 60`

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Irin Moni

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