If a person sells a radio on the marked price then he earns total profit of Rs. x. if he sells the same radio for 30% discount on the marked price then he earns Rs. y but if he gives two successive discounts of 20% and 10% then he earns Rs. z. if the difference between Y and Z is Rs. 18 and the cost price of the radio is Rs. 500 then find the sum (in Rs.) of x, y, and z?648

If a person sells a radio on the marked price then he earns total prof

1.	If a person sells a radio on the marked price then he earns total profit of Rs. x. if he sells the same radio for 30% discount on the marked price then he earns Rs. y but if he gives two successive discounts of 20% and 10% then he earns Rs. z. if the difference between Y and Z is Rs. 18 and the cost price of the radio is Rs. 500 then find the sum (in Rs.) of x, y, and z?648
A.	648
B.	678
C.	712
D.	672
E.	None of these
Answer» C. 712

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