Multiple Choice Questions on How much chicory at Rs 5 a kg should be added to 20 kg of coffee at Rs 12 a kg so that the mixture b........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

How much chicory at Rs 5 a kg should be added to 20 kg of coffee at Rs 12 a kg so that the mixture b...........

Quantitative Aptitude ( CCS) Mixture and Alligation
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    How much chicory at Rs. 5 a kg should be added to 20 kg of coffee at Rs. 12 a kg so that the mixture be worth Rs. 7.50 a kg.?

    21 kg

    Incorrect Answer

    15 kg

    Incorrect Answer

    36 kg

    Correct Answer

    42 kg

    Incorrect Answer
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    Explanation:

    Ratio in which coffee and chicory should be mixed
    = 12 – 7.5 : 7.5 – 5

    = 4.5 : 2.5 ⇒ 9 : 5.
    Let x be quantity at 4/kg. ∴ 9 : 5 = x : 20

    ⇒ x = 36kg.

    Hence, option 3 is the correct answer.

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