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The average of 6 numbers is 30. If one number is removed, the average becomes 28

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Question: The average of 6 numbers is 30. If one number is removed, the average becomes 28. What is the number that was removed?

Options:

  1. 32
  2. 34
  3. 36
  4. 38

Correct Answer: 32

Solution: 

Total of 6 numbers = 6 * 30 = 180. Total of 5 numbers = 5 * 28 = 140. Number removed = 180 - 140 = 40.

The average of 6 numbers is 30. If one number is removed, the average becomes 28

Practice Questions

Q1
The average of 6 numbers is 30. If one number is removed, the average becomes 28. What is the number that was removed?
  1. 32
  2. 34
  3. 36
  4. 38

Questions & Step-by-Step Solutions

The average of 6 numbers is 30. If one number is removed, the average becomes 28. What is the number that was removed?
  • Average Calculation – Understanding how to calculate the average and how it changes when numbers are added or removed.
  • Total Sum Derivation – Using the average to derive the total sum of a set of numbers.
  • Difference Calculation – Finding the difference between total sums to identify the removed number.
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