The average of first 9 numbers in series is 19. The average of 1st 4 numbers is 17 & the average of last 4 numbers is 22. Find the middle number.
1
12
2
13
3
15
4
18
The average of first 9 numbers in series is 19. The average of 1st 4 numbers is 17 & the average of last 4 numbers is 22. Find the middle number.