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The average of three numbers is 15. If one number is increased by 5, what will b

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Question: The average of three numbers is 15. If one number is increased by 5, what will be the new average?

Options:

  1. 15
  2. 16
  3. 17
  4. 18

Correct Answer: 16

Solution: 

Total of three numbers = 3 * 15 = 45.\\n\\nNew total = 45 + 5 = 50.\\n\\nNew average = 50 / 3 = 16.67.

The average of three numbers is 15. If one number is increased by 5, what will b

Practice Questions

Q1
The average of three numbers is 15. If one number is increased by 5, what will be the new average?
  1. 15
  2. 16
  3. 17
  4. 18

Questions & Step-by-Step Solutions

The average of three numbers is 15. If one number is increased by 5, what will be the new average?
  • Step 1: Understand that the average of three numbers is 15.
  • Step 2: Calculate the total of the three numbers by multiplying the average by the number of numbers: 3 * 15 = 45.
  • Step 3: Increase one of the numbers by 5. This means we add 5 to the total: 45 + 5 = 50.
  • Step 4: Calculate the new average by dividing the new total by the number of numbers: 50 / 3.
  • Step 5: Perform the division: 50 divided by 3 equals approximately 16.67.
  • Average Calculation – Understanding how to calculate the average of a set of numbers and how changes to the numbers affect the average.
  • Impact of Changes on Averages – Recognizing how increasing or decreasing a number in a set influences the overall average.
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