InterviewSolution
Saved Bookmarks
| 1. |
The average of 12 numbers is X. If each number is decreased by 5, then the average becomes?1. X2. X + 53. X - 54. X - 25 |
|
Answer» Correct Answer - Option 3 : X - 5 Given: The average of 12 numbers = X Formula used: Average = sum of observation/no. of observation Calculation: Average of the 12 numbers = X Sum of the 12 numbers = 12X Decrease of 1 number = 5 Decrease of 12 numbers = 12 × 5 = 60 Sum of the new 12 numbers = 12x - 60 Average of new 12 numbers = (12x - 60 )/12 = x - 5 ∴ The new average is x - 5. |
|