Question: If the average of 12 numbers is 45, what will be the average if one number is removed which is 60?
Options:
44
45
46
47
Correct Answer: 44
Solution:
Total = 12 * 45 = 540. New total = 540 - 60 = 480. New average = 480 / 11 = 43.64.
If the average of 12 numbers is 45, what will be the average if one number is re
Practice Questions
Q1
If the average of 12 numbers is 45, what will be the average if one number is removed which is 60?
44
45
46
47
Questions & Step-by-Step Solutions
If the average of 12 numbers is 45, what will be the average if one number is removed which is 60?
Step 1: Calculate the total of the 12 numbers by multiplying the average (45) by the number of numbers (12). So, Total = 12 * 45.
Step 2: Perform the multiplication: 12 * 45 = 540. This means the total of all 12 numbers is 540.
Step 3: Remove the number 60 from the total. So, New total = 540 - 60.
Step 4: Perform the subtraction: 540 - 60 = 480. This is the new total after removing the number.
Step 5: Calculate the new average by dividing the new total (480) by the new number of numbers (11, since we removed one number). So, New average = 480 / 11.
Step 6: Perform the division: 480 / 11 = 43.64. This is the new average after removing the number 60.
Average Calculation – Understanding how to calculate the average of a set of numbers and how it changes when a number is removed.
Total Sum Calculation – Calculating the total sum of numbers from the average and the number of items.
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