1. Find the mean of 4, 6, 8, 10 and 12.
- A8
- B10
- C40
- D6
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Answer: A) 8
Mean = sum ÷ number of values = 40 ÷ 5 = 8. (40 is the sum, not the mean.)
Class 8 Mean and Median — 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. The bar graph shows samosas sold at a stall on five days. What is the median number sold?
- A48
- B35
- C55
- D50
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Answer: D) 50
In order: 35, 40, 50, 55, 60. The middle value is 50. (48 is the mean.)
3. The mean of 6 numbers is 15. If the number 20 is removed, what is the mean of the rest?
- A15
- B14
- C13
- D17.5
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Answer: B) 14
Total = 6 × 15 = 90. After removing 20: 70. Mean of 5 numbers = 14.
4. In the spreadsheet, cells A1 to A5 hold the values shown. What number will cell A6 display?
- A12
- B15
- C14
- D70
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Answer: C) 14
AVERAGE gives the mean: (12 + 15 + 9 + 20 + 14) ÷ 5 = 70 ÷ 5 = 14. (70 is the sum.)
5. Rohit's marks are 65, 70, 75, 80 and x, where x is more than 80. If the mean equals the median, what is x?
- A90
- B100
- C75
- D85
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Answer: D) 85
With x > 80, the median is 75. Mean = 75 means total = 375, so x = 375 − 290 = 85.
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