The average of 6 numbers is 50. When a new number is added, the average becomes 53. Find the new number.
- A. 54
- B. 71 ✓
- C. 82
- D. 56
Correct answer
B. 71
Explanation
Total of 6 numbers = 300. Total of 7 numbers = 371. New number = 371 - 300 = 71.
B. 71
Total of 6 numbers = 300. Total of 7 numbers = 371. New number = 371 - 300 = 71.