Monthly rainfall (in mm) for 4 months was 120, 200, 180, 90. What is the average monthly rainfall?
- A.145
- B.147.5 ✓
- C.150
- D.152.5
Explanation: (120+200+180+90) ÷ 4 = 590 ÷ 4 = 147.5.
Class 6 IMO Mathematics Olympiad practice · Data & Measurement · Data Handling & Presentation
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