Question
An item costs Rs.1250. It is marked up by x% and then
sold after a discount of (x β 8)%. The seller earns a profit of Rs.30. Find the marked price.Solution
ATQ, 1250 * (100 + x)/100 * (100 β (x β 8))/100 = 1250 + 30 1250 * (100 + x)/100 * (108 β x)/100 = 1280 (100 + x) * (108 β x) = 10240 10800 β 100x + 108x β x2 = 10240 x2Β β 8x β 560 = 0 x2Β β 28x + 20x β 560 = 0 x(x β 28) + 20(x β 28) = 0 (x β 28)(x + 20) = 0 x = +28, β20 x = 28 Marked price = 1250 * 128/100 = Rs.1600
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