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Alloy A contains copper and zinc in the ratio 5 : 2 and alloy B contains copper and zinc in the ratio 3 : 4. Alloy C is prepared by mixing A and B in the ratio 4 : 5. What is ratio of copper to zinc in alloy C is?

Alloy A contains copper and zinc in the ratio 5 : 2 and alloy B contains copper and zinc in the ratio 3 : 4. Alloy C is prepared by mixing A and B in the ratio 4 : 5. What is ratio of copper to zinc in alloy C is? Correct Answer 5 : 4 

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