SOLUTION: A contractor mixes concrete from bags of pre-mix for small jobs. How many bags with 11% cement should he mix with 10 bags of 12.5% cement to produce a mix containing 12% cement?

Question 1162615: A contractor mixes concrete from bags of pre-mix for small jobs. How many bags with 11% cement should he mix with 10 bags of 12.5% cement to produce a mix containing 12% cement?
Answer by josgarithmetic(39618) (Show Source): You can put this solution on YOUR website!
b number of bags of the 11%
10 bags of the 12.5%
Total Number Bags, b+10

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