Data Handling — Important Questions
ICSE · Class 7 · Mathematics
90 important questions from Data Handling for ICSE Class 7 Mathematics, with answers. Includes multiple choice, multiple correct and true false questions.
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Important Questions from Data Handling
The mean of 35 observations is 23. If 5 is subtracted from each observation, what is the new mean?
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18
1. Original mean = 23. 2. When each observation is decreased by 5, the mean also decreases by 5. 3. New mean = 23 - 5 = 18. So the new mean is 18.
The mean of 7 observations is 54. If each observation is multiplied by 6, what is the new mean?
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324
1. Original mean = 54. 2. When each observation is multiplied by 6, the mean is also multiplied by 6. 3. New mean = 54 × 6 = 324. So the new mean is 324.
The mean of 15 observations is 54. If each observation is divided by 6, what is the new mean?
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9
1. Original mean = 54. 2. When each observation is divided by 6, the mean is also divided by 6. 3. New mean = 54 ÷ 6 = 9. So the new mean is 9.
The mean of 30 observations is 12. What is the sum of all observations?
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360
1. Sum of all observations = Mean × Number of observations. 2. Sum = 12 × 30 = 360. So the sum of all observations is 360.
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