The average of 6 numbers is 63. When a new number is added, the average becomes 65. Find the new number.
- A. 61
- B. 92
- C. 95
- D. 77 ✓
Correct answer
D. 77
Explanation
Total of 6 numbers = 378. Total of 7 numbers = 455. New number = 455 - 378 = 77.
D. 77
Total of 6 numbers = 378. Total of 7 numbers = 455. New number = 455 - 378 = 77.