Example 1 · level 1
Here are the maximum temperature (°C) in Pune over 4 days: 36, 28, 35, 33. Find the mean.
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- Sum = 36 + 28 + 35 + 33 = 132.
- Mean = 132 ÷ 4 = 33.
Answer: 33
CLASS 7 MATHS · DATA HANDLING
Mean and range of data
Mean (average) = sum ÷ number of values. Range = highest − lowest.
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Worked examples
Example 2 · level 2
Here are the maximum temperature (°C) in Jaipur over 6 days: 27, 36, 36, 38, 18, 20. Find the range.
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- Highest = 38, lowest = 18.
- Range = 38 − 18 = 20.
Answer: 20
Example 3 · level 3
Here are the marks of 8 students in a maths test: 7, 20, 8, 5, 17, 12, 20, 10. Find the range.
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- Highest = 20, lowest = 5.
- Range = 20 − 5 = 15.
Answer: 15