A bar graph shows umbrella sales over 4 days: 12, 18, 9, 21. What is the average number of umbrellas sold per day?
- A.12
- B.14
- C.15 ✓
- D.16
Explanation: (12+18+9+21) ÷ 4 = 60 ÷ 4 = 15.
Class 6 IMO Mathematics Olympiad practice · Data & Measurement · Data Handling & Presentation
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