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    Question

    A tradesman gives 10% discount on the marked price and

    gives 1 article free for buying every 30 articles and thus gain 35%. The cost price is below the marked price by approximately
    A 39.5% Correct Answer Incorrect Answer
    B 45% Correct Answer Incorrect Answer
    C 55% Correct Answer Incorrect Answer
    D 35% Correct Answer Incorrect Answer

    Solution

    Let the C.P of each article be Rs 100 Then,  C.P of 31 articles = Rs (100 × 31) = Rs 3,100 S.P of 30 articles = Rs (3,100×135/100) = Rs 4,185 S.P of each article = 4,185/30 = Rs 139.5  If S.P is Rs 90, marked price = Rs 100 If S.P is Rs 139.5, marked price = Rs (139.5×100/90) = Rs 155 ∴ Cost price = 55/155×100  = 35.48% below Marked price

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