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    Question

    How many kilograms of wheat, priced at Rs 6.4/kg, should

    be mixed with 10 kg of gram flour priced at Rs 4.8/kg, such that by selling the mixture at a 20% profit, the selling price   is Rs. 1.12 more than the average cost price per kg of both varieties of the mixture?
    A 20 kg Correct Answer Incorrect Answer
    B 15 kg Correct Answer Incorrect Answer
    C 10 kg Correct Answer Incorrect Answer
    D 12 kg Correct Answer Incorrect Answer
    E none of these Correct Answer Incorrect Answer

    Solution

    ATQ, we can say that Let the quantity of Rs 6.4/kg be a kg. S.P of mixture= Rs [1.12 + (6.4 + 4.8)/2]=1.12 + 5.6= Rs 6.72 According to question, =>(a × 6.4 + 4.8 × 10) × 120/100= 6.72(a + 10) =>6.4a × 120/100 + 48 × 120/100= 6.72a + 67.2 =>0.96a= 9.6  a= 9.6/0.96= 10kg.

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