1. Find the mean of 6, 8, 10, 12, 14.
- A10
- B50
- C9
- D12
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Answer: A) 10
Sum = 6+8+10+12+14 = 50. Count = 5. Mean = 50/5 = 10.
Class 7 Data Handling — practice questions with answers
Data Handling · 5 sample questions from the school syllabus. Try each one, then open the answer and the worked solution.
2. Find the mean of the first five whole numbers: 0, 1, 2, 3, 4.
- A2
- B1
- C4
- D3
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Answer: A) 2
Sum = 0+1+2+3+4 = 10. Count = 5. Mean = 10/5 = 2.
3. Find the mean of 7, 10, 4, 9, 5.
- A14
- B7
- C8
- D6
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Answer: B) 7
Sum = 7+10+4+9+5 = 35. Count = 5. Mean = 35/5 = 7.
4. Which statement is correct?
- AThe mean may not be one of the values in the data set.
- BThe mean is always the largest value in the data set.
- CThe mean is always equal to the median.
- DThe mean must be a whole number.
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Answer: A) The mean may not be one of the values in the data set.
The mean of 2 and 5 is 3.5, which is not in the data. So the mean need not be one of the actual values, need not equal the median, and need not be a whole number.
5. The mean of five numbers is 30. If each number is increased by 4, what is the new mean?
- A31
- B68
- C34
- D37
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Answer: C) 34
When every value increases by 4, the mean also increases by 4. New mean = 30 + 4 = 34.
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