Pharmacist
The pharmacist had a 12 liters vessel herbal lotion, which contained a 30% active ingredient. Her assistant poured 18 liters of herbal lotion containing 45% of the active ingredient into a container. What percentage of herbal lotion was produced?
Correct answer:
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You need to know the following knowledge to solve this word math problem:
- statistics
- weighted average
- algebra
- expression of a variable from the formula
- basic functions
- percentages
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