The average of 8 numbers is 24. If one of the numbers is excluded, the average becomes 22. Find the excluded number.
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e. 38.
We know that,
Average = Sum of observations/Number of observations
The sum of 8 numbers = 24 × 8 = 192
After one number, excluding the average, it becomes 22
The sum of the remaining 7 numbers = 22 × 7 = 154
Hence,
The excluded number is 192 - 154 = 38