a goldsmith has two alloys that are different purities of gold. The first is 3/4 pure gold and the second is?
5/12 pure gold. How many ounces of each should be melted and mixed in order to obtain a 6 oz mixture that is 2/3 pure gold?
9/2 ounces of the “3/4″ gold + 3/2 ounces of the “5/12″ gold.
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