Sterling silver is 92.5% silver and 7.5% copper. One silver-copper is 94.0% silver, and the other is 85.0% silver. How much of each should be added to make 100 of sterling silver?

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01-07-2024
Mathematics

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Sterling silver is 92.5% silver and 7.5% copper. One silver-copper is 94.0% silver, and the other is 85.0% silver. How much of each should be added to make 100 of sterling silver?

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