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The average of 12 numbers is 60. If one number is removed, the average becomes 5

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Question: The average of 12 numbers is 60. If one number is removed, the average becomes 58. What is the removed number?

Options:

  1. 66
  2. 60
  3. 54
  4. 62

Correct Answer: 62

Solution: 

Total of 12 numbers = 12 * 60 = 720. Total of 11 numbers = 11 * 58 = 638. Removed number = 720 - 638 = 82.

The average of 12 numbers is 60. If one number is removed, the average becomes 5

Practice Questions

Q1
The average of 12 numbers is 60. If one number is removed, the average becomes 58. What is the removed number?
  1. 66
  2. 60
  3. 54
  4. 62

Questions & Step-by-Step Solutions

The average of 12 numbers is 60. If one number is removed, the average becomes 58. What is the removed number?
  • Average Calculation – Understanding how to calculate the average and how it changes when a number is removed.
  • Total Sum Calculation – Calculating the total sum of a set of numbers based on their average.
  • Difference Calculation – Finding the difference between the total sums to determine the removed number.
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