| Q.17 | The average age of a group is increased by 4 years when a person of whose age is 32 years was replaced by a person whose age is 56. Find the number of people in the group | |
| Ans | 1. 7 | |
| 2. 9 | ||
| 3. 6 | ||
| 4. 8 |
Correct Ans: 3
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