The average of 4 numbers is 51. When a new number is added, the average becomes 52. Find the new number.
- A. 47
- B. 56 ✓
- C. 68
- D. 61
Correct answer
B. 56
Explanation
Total of 4 numbers = 204. Total of 5 numbers = 260. New number = 260 - 204 = 56.
B. 56
Total of 4 numbers = 204. Total of 5 numbers = 260. New number = 260 - 204 = 56.