A and B are two alloys of gold and coppe...

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

`5: 7`

`5:9`

`7:5`

`9:5`

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