The average of 5 numbers is 45. When a new number is added, the average becomes 47. Find the new number.
- A. 48
- B. 47
- C. 57 ✓
- D. 70
Correct answer
C. 57
Explanation
Total of 5 numbers = 225. Total of 6 numbers = 282. New number = 282 - 225 = 57.
C. 57
Total of 5 numbers = 225. Total of 6 numbers = 282. New number = 282 - 225 = 57.