Mathematics · Averages
A refinery produces 3 grades of gasoline: Regular (85% octane), Mid-grade (90% octane), and Premium (95% octane). If 200 barrels of Regular, 100 barrels of Mid-grade, and 100 barrels of Premium are mixed together, what is the average octane rating of the mixture?
- 188.75%✓
- 289%
- 388.25%
- 488.5%
Correct answer
88.75%
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