Practicing Success
The average of 42 numbers is 37. The average of the first 26 numbers is 32, and the average of the last 17 numbers is 44. The 26th number is: |
28 27 26 25 |
26 |
Sum of 42 numbers = 42 × 37 = 1554 Sum of first 26 number is = 26 × 32 = 832 Sum of last 17 numbers = 17 × 44 = 748 26th number = ( 832 + 748) - 1554 = 26 |