The average of 4 numbers is 28. When a new number is added, the average becomes 33. Find the new number.
- A. 57
- B. 53 ✓
- C. 60
- D. 47
Correct answer
B. 53
Explanation
Total of 4 numbers = 112. Total of 5 numbers = 165. New number = 165 - 112 = 53.
B. 53
Total of 4 numbers = 112. Total of 5 numbers = 165. New number = 165 - 112 = 53.