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The average of 4 numbers is 30. If one number is increased by 10, what will be t
The average of 4 numbers is 30. If one number is increased by 10, what will be the new average?
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Practice Questions
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Q1
The average of 4 numbers is 30. If one number is increased by 10, what will be the new average?
30
32.5
35
37.5
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Total = 30 * 4 = 120. New total = 120 + 10 = 130. New average = 130 / 4 = 32.5.
Questions & Step-by-step Solutions
1 item
Q
Q: The average of 4 numbers is 30. If one number is increased by 10, what will be the new average?
Solution:
Total = 30 * 4 = 120. New total = 120 + 10 = 130. New average = 130 / 4 = 32.5.
Steps: 3
Show Steps
Step 1: Find the total of the 4 numbers by multiplying the average (30) by the number of numbers (4). So, 30 * 4 = 120.
Step 2: Increase one of the numbers by 10. This means we add 10 to the total we found in Step 1. So, 120 + 10 = 130.
Step 3: Calculate the new average by dividing the new total (130) by the number of numbers (4). So, 130 / 4 = 32.5.
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