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Question

# 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 from a third alloy C the ratio of gold and copper in C will be

A
5:7
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B
5:9
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C
7 :5
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D
9 :5

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E
None of these
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Solution

## The correct option is C 7 :5 Here, a1=7 b1=2 and a2=7 b2=11 By Short Trick 1 Ratio of gold and Copper in C =79+71829+1118 =14+74+11=2115=7:5

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