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Quiz 5 : Question 9 of 10

An alloy of copper and zinc contains copper and zinc in the ratio 5 : 3. Another alloy of copper and zinc contains copper and zinc in the ratio 1 : 7. In what ratio should the two alloys be mixed so that the resultant alloy contains equal proportions of copper and zinc?

A.     1 : 5

B.     7 : 3

C.     5 : 3

D.     3 : 1

E.     4 : 3


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