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      Question

      An alloy of artificial gold contains 83% Copper and

      remaining Aluminium. In an another alloy, Copper is 91% and Aluminium is 7%. In what ratio should the two alloys be mixed so that the new mixture have 15% Aluminium. Also find the % of Copper in the new mixture?
      A 84.6%, 4:1 Correct Answer Incorrect Answer
      B 75.8%, 2:1 Correct Answer Incorrect Answer
      C 82.5%, 5:3 Correct Answer Incorrect Answer
      D 78.4%, 6:7 Correct Answer Incorrect Answer

      Solution

      The alloy should be mix in the ratio of 4:1 Now,┬а Difference of 91-83 = 8 8 is divided in the ratio of 4:1 8 ├Ч `1/5` ┬а= 1.6%

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