1. What is the arithmetic mean of 4, 6 and 8?
- A6
- B9
- C18
- D5
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Answer: A) 6
Mean = (4 + 6 + 8) / 3 = 18 / 3 = 6.
Class 7 Arithmetic Mean — 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. Priya spent ₹20, ₹30 and ₹40 on three days. Her mean daily spending is:
- A₹30
- B₹90
- C₹35
- D₹25
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Answer: A) ₹30
Mean = (20 + 30 + 40) / 3 = 90 / 3 = ₹30.
3. The mean of 5 numbers is 18. If one number 22 is removed, the mean of the remaining four numbers is:
- A17
- B18
- C20
- D16
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Answer: A) 17
Total = 18 x 5 = 90. Remaining sum = 90 - 22 = 68. New mean = 68 / 4 = 17.
4. The mean monthly income of a family of 5 in Bhopal is ₹8,000.
If one earning member who contributed ₹12,000 leaves the family,
find the mean income of the remaining 4 members.
If one earning member who contributed ₹12,000 leaves the family,
find the mean income of the remaining 4 members.
- A₹7,000
- B₹8,000
- C₹6,000
- D₹9,000
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Answer: A) ₹7,000
Total income = 8000 x 5 = 40000. Remaining = 40000 - 12000 = 28000. Mean = 28000 / 4 = ₹7,000.
5. In a colony in Nagpur, the mean monthly electricity bill of 25 houses is ₹600.
The mean bill of 10 of these houses is ₹720.
Find the mean bill of the remaining 15 houses.
The mean bill of 10 of these houses is ₹720.
Find the mean bill of the remaining 15 houses.
- A₹520
- B₹500
- C₹540
- D₹480
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Answer: A) ₹520
Total of 25 = 600 x 25 = 15000. Total of 10 = 720 x 10 = 7200. Remaining 15 total = 15000 - 7200 = 7800. Mean = 7800 / 15 = ₹520.
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