Multiple choice

The average of six numbers is 28. If one of the numbers is excluded, the average of the remaining numbers is 29. Find the excluded number.

  1. 33

  2. 23

  3. 28

  4. 38
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The excluded number equals the difference between the total sum of six numbers (6 × 28 = 168) and the sum of the remaining five (5 × 29 = 145). Therefore, 168 - 145 = 23.

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