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Question : 67
Total: 100
A random sample of 20 people is classified in the following table according to their ages:
What is the mean age of this group of people?
| Age | Frequency |
|---|---|
| 15-25 | 2 |
| 25-35 | 4 |
| 35-45 | 6 |
| 45-55 | 5 |
| 55-65 | 3 |
[NDA II 2016]
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