competitive exam Exam Numerical Ability

two alloys contain silver and copper in the ratio 3:1 and 5:3. In what ratio the two alloys should be added together to get a new alloy having silver and copper in the ratio of 2:1?

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competitive exam Other Question
A certain sum is interested at compound interest. The interest accrued in the first two years is rs 272 and that in the first three years is rs 434. find the rate percent.