A Chemist Has Two Alloys, One of Which Is 10

question 30

Multiple Choice

A chemist has two alloys, one of which is 10% gold and 20% lead, and the other of which is 30% gold and 40% lead. How many grams of each of the two alloys should be used to make an alloy that contains 65 g of gold and 118 g of lead?

• A) First alloy: 60 g; second alloy: 470 g
• B) First alloy: 470 g; second alloy: 62 g
• C) First alloy: 472 g; second alloy: 60 g
• D) First alloy: 470 g; second alloy: 60 g
• E) None of the above

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