SOLUTION: A 13 L solution that was 11% vinegar was mixed with a 6 L solution that was 70% vinegar. Find the new concentration of vinegar.

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Question 1141032: A 13 L solution that was 11% vinegar was mixed with a 6 L solution that was 70% vinegar. Find the new concentration of vinegar.
Answer by Alan3354(69443) About Me  (Show Source):
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A 13 L solution that was 11% vinegar was mixed with a 6 L solution that was 70% vinegar. Find the new concentration of vinegar.
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C = (13*11 + 6*70)/(13+6)