The average of five numbers is 27. If one number is excluded, the average becomes 25. The excluded number is

Given that , The average of five numbers = 27 Total sum of five numbers = 27 × 5 = 135 If one number is excluded, the average of five numbers = 25 Total sum of four numbers = 25 × 4 = 100 ∴ Required number = 135 – 100 = 35