SOLUTION: A metal alloy weighing 12 lb. and containing 20% copper is melted and mixed with 3 lb. of a different alloy which contains 40% copper. What percent of the resulting alloy is co

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Question 685848: A metal alloy weighing 12 lb. and containing
20% copper is melted and mixed with 3 lb. of a
different alloy which contains 40% copper.
What percent of the resulting alloy is copper?
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
A metal alloy weighing 12 lb. and containing
20% copper is melted and mixed with 3 lb. of a
different alloy which contains 40% copper.
What percent of the resulting alloy is copper?
**
20%*12+40%*3/12+3=(2.4+1.2)/15=3.6/15=.24
What percent of the resulting alloy is copper? 24%