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Average - Data Intensity 2 :: Discussion
| 9. | The average age of a group of 10 persons was decreased by 3 years when one person, whose age was 42 years, was replaced by a new person. Find the age of the new person? | |
| A. | 22 | |
| B. | 24 | |
| C. | 12 | |
| D. | 8 | |
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