The average of 5 numbers is 53. When a new number is added, the average becomes 55. Find the new number.
- A. 50
- B. 55
- C. 78
- D. 65 ✓
Correct answer
D. 65
Explanation
Total of 5 numbers = 265. Total of 6 numbers = 330. New number = 330 - 265 = 65.
D. 65
Total of 5 numbers = 265. Total of 6 numbers = 330. New number = 330 - 265 = 65.