The average of five numbers is 30 if one number is excluded the average becomes 31. What is the excluded number?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 26.
Total of 5 numbers = 5 × 30 = 150
Total of remaining 4 numbers = 4 × 31 = 124
Excluded number = 150 − 124 = 26