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Arithmetic mean of nine observations is ...

Arithmetic mean of nine observations is calculated as 38. But in doing so, mistakenly the observation 27 is taken instead of 72. Find the actual mean of the data.

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VGS PUBLICATION-BRILLIANT-FREQUENCY DISTRIBUTION TABLES AND GRAPHS-EXERCISE
  1. Find the mean of the data: 10.25, 9, 4.75, 8, 2.65, 12, 2.35.

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  2. Mean of eight observations is 25. If one observation 11 is excluded, t...

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  3. Arithmetic mean of nine observations is calculated as 38. But in doing...

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  4. Five years ago mean age of a family was 25 years. What is the present ...

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  5. Two years ago the mean age of 40 people was 11 years. Now a person lef...

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  6. Find the sum of deviations of all ob servations of the data 5, 8, 10, ...

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  7. If sum of the 20 deviations from the ‘mean is 100, then find the mean ...

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  8. Marks of 12 students in a unit test are given as 4, 21, 13, 17, 5, 9, ...

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  9. Arithmetic mean of marks (out of 25) scored by 10 students was 15. One...

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  10. The sum of deviations of ‘n’ observa tions from 25 is 25 and sum of de...

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  11. Find the median of the data:3.3, 3.5, 3.1, 3.7, 3.2, 3.8

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  12. Find the Median for the following data 30, 17, 12, 21, 33, 22 Ascendi...

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  13. Find the mode of 10, 12, 11, 10, 15,20, 19, 21, 11, 9, 10.

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  14. Mode of certain scores is x. If each score is decreased by 3, then fin...

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  15. Find the mode of all digits used in writing the natural numbers from 1...

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  16. Observations of a raw data are 5,28,15, 10, 15, 8, 24. Add, four more ...

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  17. If the mean of a set of observationsx1, x2 x10 is 20. Find the mean of...

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  18. The median of the data x/5, x, x/4, x/2 and x/8 is 8. Find the value o...

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  19. The median of a set of 9 distinct observations is 20.5. If each of the...

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  20. Make a frequency distribution of the following series. 1, 2, 2, 3, 3, ...

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