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The average of 4 numbers is 15. If one number is increased by 5, what will be th

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Question: The average of 4 numbers is 15. If one number is increased by 5, what will be the new average? (2019)

Options:

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

Correct Answer: 16

Exam Year: 2019

Solution: 

Total of 4 numbers = 4 * 15 = 60. New total = 60 + 5 = 65. New average = 65 / 4 = 16.25.

The average of 4 numbers is 15. If one number is increased by 5, what will be th

Practice Questions

Q1
The average of 4 numbers is 15. If one number is increased by 5, what will be the new average? (2019)
  1. 15
  2. 16
  3. 17
  4. 18

Questions & Step-by-Step Solutions

The average of 4 numbers is 15. If one number is increased by 5, what will be the new average? (2019)
  • Step 1: Understand that the average of 4 numbers is 15.
  • Step 2: Calculate the total of the 4 numbers by multiplying the average by the number of numbers: 4 * 15 = 60.
  • Step 3: Increase one of the numbers by 5. This means we add 5 to the total: 60 + 5 = 65.
  • Step 4: Calculate the new average by dividing the new total by the number of numbers: 65 / 4 = 16.25.
  • 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 affects the overall average.
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