Multiple Choice Questions on One alloy contains silver and copper in the ratio 5 1 and the other contains in the ratio 7 2 respec........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

One alloy contains silver and copper in the ratio 5 1 and the other contains in the ratio 7 2 respec...........

Quant (SSC) Mixture and Alligation
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    One alloy contains silver and copper in the ratio 5:1 and the other contains in the ratio 7:2 respectively. What weights of the 2 must be melted together, so as to make a 5 lb mass with 80% silver?

    5:3

    Incorrect Answer

    3:2

    Incorrect Answer

    2:3

    Correct Answer

    2:5

    Incorrect Answer
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    Explanation:

    5/6                     7/9
                 4/5
    1/45                   1/30
    Hence, the ratio is 1/47 : 1/30
    = 30 : 45
    = 2 : 3

    By: Amit Kumar
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