The average of 10 numbers is 35. When a new number is added, the average becomes 40. Find the new number.
- A. 70
- B. 96
- C. 90 ✓
- D. 112
Correct answer
C. 90
Explanation
Total of 10 numbers = 350. Total of 11 numbers = 440. New number = 440 - 350 = 90.
C. 90
Total of 10 numbers = 350. Total of 11 numbers = 440. New number = 440 - 350 = 90.