Question: The average of 4 numbers is 20. If one number is increased by 10, what will be the new average?
Options:
20
22.5
25
30
Correct Answer: 22.5
Solution:
Total of 4 numbers = 4 * 20 = 80. New total = 80 + 10 = 90. New average = 90 / 4 = 22.5.
The average of 4 numbers is 20. If one number is increased by 10, what will be t
Practice Questions
Q1
The average of 4 numbers is 20. If one number is increased by 10, what will be the new average?
20
22.5
25
30
Questions & Step-by-Step Solutions
The average of 4 numbers is 20. If one number is increased by 10, what will be the new average?
Average Calculation – Understanding how to calculate the average of a set of numbers and how changes to individual numbers affect the overall average.
Impact of Changes on Averages – Recognizing that increasing one number in a set affects the total and thus the average.
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