The average of 4 numbers is 35. When a new number is added, the average becomes 40. Find the new number.
- A. 65
- B. 54
- C. 48
- D. 60 ✓
Correct answer
D. 60
Explanation
Total of 4 numbers = 140. Total of 5 numbers = 200. New number = 200 - 140 = 60.
D. 60
Total of 4 numbers = 140. Total of 5 numbers = 200. New number = 200 - 140 = 60.