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

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

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

Gold in C


Copper in C


∴ Gold: Copper = 7/6:5/6 = 7:5