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The average of 5 numbers is 12. If one number is removed, the average of the rem

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Question: The average of 5 numbers is 12. If one number is removed, the average of the remaining numbers becomes 10. What is the number that was removed?

Options:

  1. 8
  2. 10
  3. 12
  4. 14

Correct Answer: 14

Solution: 

Total of 5 numbers = 5 * 12 = 60. Total of 4 numbers = 4 * 10 = 40. Number removed = 60 - 40 = 20.

The average of 5 numbers is 12. If one number is removed, the average of the rem

Practice Questions

Q1
The average of 5 numbers is 12. If one number is removed, the average of the remaining numbers becomes 10. What is the number that was removed?
  1. 8
  2. 10
  3. 12
  4. 14

Questions & Step-by-Step Solutions

The average of 5 numbers is 12. If one number is removed, the average of the remaining numbers becomes 10. What is the number that was removed?
  • Average Calculation – Understanding how to calculate the average and manipulate it when numbers are added or removed.
  • Basic Algebra – Using algebraic expressions to represent the relationships between sums and averages.
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