The average of 8 numbers is 69. When a new number is added, the average becomes 72. Find the new number.
- A. 75
- B. 96 ✓
- C. 78
- D. 89
Correct answer
B. 96
Explanation
Total of 8 numbers = 552. Total of 9 numbers = 648. New number = 648 - 552 = 96.
B. 96
Total of 8 numbers = 552. Total of 9 numbers = 648. New number = 648 - 552 = 96.