The average of 9 numbers is 56. When one number is removed, the average becomes. 54. What number was removed?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 72.
Average of 9 numbers = 56
Total = 9 × 56 = 504
After removing one number:
Average of 8 numbers = 54
Total = 8 × 54 = 432
Removed number = 504 − 432 = 72