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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 equal quantities of alloys are melted to form a third alloy C, find the ratio of Gold and Copper in C ?

7:5 Let's take 18 grams of alloy A and 18 grams of B. They contain 2*7+7 = 21 grams gold and 2*2+11=15 grams copper => 7:5

An alloy contains zinc and copper in the ratio of 5 : 8 and another alloy contains zinc and copper in the ratio of 5 : 3 . If equal amount of both the alloys are melted together .

What is the ratio of zinc and copper in the resulting alloy ?

An alloy contains alluminium and zinc in the ratio 5 : 3 and another alloy contains alluminium and copper in the ratio 8 : 5. If equal weights of both the alloys are mixed together, then what would be the weight of copper per kg in the resulting alloy?

If blue rectangle area is equal to the sum of 3 squares areas combined as in image, what is relation between a,b,c & d?

The present ages of A,B and C are in proportions 4:5:6. Eight years ago, the sum of their ages was 66. What is the sum of present age of A and C?

Solve this without paper and pen?