WAEC 2018 Geography · Question 6
Use the climatic data to answer the question below Month Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec…
Question
Use the climatic data to answer the question below Month Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec. Temperature(°C) 26 26 26 26 26 27 27 28 28 28 27 27 Rainfall(mm) 35 50 104 139 195 228 248 243 245 250 91 55 What is the mean temperature from July to December?
- A.16.5°C
- B.17.2°C
- C.27.5°C
- D.28°C
Answer: C. 27.5°C
Explanation written with AI and checked against the answer key
Analyze the question: We need the mean (average) temperature for the six months from July to December.
Concept: Mean = (sum of all values) ÷ (number of values)
Solution:
Temperatures from July to December:
- July = 27°C
- August = 28°C
- September = 28°C
- October = 28°C
- November = 27°C
- December = 27°C
Sum = 27 + 28 + 28 + 28 + 27 + 27 = 165°C
Number of months = 6
Mean = 165 ÷ 6 = 27.5°C
Answer: The mean temperature from July to December is 27.5°C, which matches option C.
Tip: Read the month range carefully. July to December is 6 months (July, Aug, Sept, Oct, Nov, Dec), so divide by 6. You can also check quickly: the values are only 27 and 28, so the mean must lie between them. Options A and B are impossible, and since three months are 27 and three are 28, the mean is exactly halfway, 27.5.
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