The average of 10 numbers is 63. When a new number is added, the average becomes 66. Find the new number.
- A. 109
- B. 113
- C. 85
- D. 96 ✓
Correct answer
D. 96
Explanation
Total of 10 numbers = 630. Total of 11 numbers = 726. New number = 726 - 630 = 96.
D. 96
Total of 10 numbers = 630. Total of 11 numbers = 726. New number = 726 - 630 = 96.