The average of 10 numbers is 37. When a new number is added, the average becomes 39. Find the new number.
- A. 67
- B. 62
- C. 59 ✓
- D. 73
Correct answer
C. 59
Explanation
Total of 10 numbers = 370. Total of 11 numbers = 429. New number = 429 - 370 = 59.
C. 59
Total of 10 numbers = 370. Total of 11 numbers = 429. New number = 429 - 370 = 59.