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The average of five numbers is 20. If one number is removed, the average becomes

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Question: The average of five numbers is 20. If one number is removed, the average becomes 18. What is the removed number?

Options:

  1. 22
  2. 20
  3. 18
  4. 16

Correct Answer: 22

Solution: 

Total of five numbers = 5 * 20 = 100. Total of four numbers = 4 * 18 = 72. Removed number = 100 - 72 = 28.

The average of five numbers is 20. If one number is removed, the average becomes

Practice Questions

Q1
The average of five numbers is 20. If one number is removed, the average becomes 18. What is the removed number?
  1. 22
  2. 20
  3. 18
  4. 16

Questions & Step-by-Step Solutions

The average of five numbers is 20. If one number is removed, the average becomes 18. What is the removed number?
  • Average Calculation – Understanding how to calculate the average and how it changes when numbers are added or removed.
  • Basic Algebra – Using algebraic manipulation to find the value of an unknown variable based on given averages.
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