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A and B are two alloys of gold and copper prepared by mixing metals in the ratio 7 : 2 and 7: 11 respectively. If

A and B are two alloys of gold and copper prepared by mixing metals in the ratio 7 : 2 and 7: 11 respectively. If equal quantities of the alloys are melted to form a third alloy C, what will be the ratio of gold and copper in C?

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