How many kg of an alloy containing 85% silver must be melted with 10 kg of an alloy containing 60% silver to obtain an alloy with 75% silver?
Correct answer B. 15 kg
Explanation
60% : 85% = (85 - 75) : (75 - 60) = 10 : 15 = 2 : 3. With 10 kg of the 60% alloy, the 85% alloy needed = 15 kg.
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