The average of five numbers is 28. If one number is removed, the average becomes 25. What is the removed number?
Show answer & explanation
Correct answer: C
Explanation
Average of 5 numbers = 28
Therefore, total sum of 5 numbers = 28 × 5= 140
Average of 4 numbers after removing one number = 25
Therefore, total sum of 4 numbers = 25 × 4= 100
Removed number = 140 - 100= 40