The average of 10 numbers is 51. When a new number is added, the average becomes 52. Find the new number.
- A. 68
- B. 72
- C. 47
- D. 62 ✓
Correct answer
D. 62
Explanation
Total of 10 numbers = 510. Total of 11 numbers = 572. New number = 572 - 510 = 62.
D. 62
Total of 10 numbers = 510. Total of 11 numbers = 572. New number = 572 - 510 = 62.