The average of 15 numbers is 7. If the average of the first 8 numbers be 6.5 and the average of last 8 numbers be 9.5, then the middle number is
5 387 6290a569d84556078aeb3508
Q:
The average of 15 numbers is 7. If the average of the first 8 numbers be 6.5 and the average of last 8 numbers be 9.5, then the middle number is
- 123true
- 218false
- 320false
- 421false
- Show Answer
- Workspace
- Discuss