The average of 8 numbers is 26. If one number is excluded, the average becomes 25. Find the excluded number.
Show answer & explanation
Correct answer: C
Explanation
Given:
Average of 8 numbers = 26
Average after removing one number = 25
Formula:
Total sum = Average × Number
Total sum of 8 numbers = 26 × 8 = 208
Total sum of 7 numbers = 25 × 7 = 175
Number removed = 208 − 175 = 33