Question

The average of eight numbers is 20. The average of five of these numbers is 20. The average of the remaining three numbers is

• A. 22
• B. 19
• C. 21
• D. 20

Answer 1

Answer:

D. 20

Here's how to solve this problem:

1. Calculate the total sum of the eight numbers:

• Average of eight numbers = 20

• Total sum of eight numbers = 8 * 20 = 160

2. Calculate the total sum of the five numbers:

• Average of five numbers = 20

• Total sum of five numbers = 5 * 20 = 100

3. Calculate the total sum of the remaining three numbers:

• Total sum of remaining three numbers = Total sum of eight numbers - Total sum of five numbers

• Total sum of remaining three numbers = 160 - 100 = 60

4. Calculate the average of the remaining three numbers:

• Average of remaining three numbers = Total sum of remaining three numbers / 3

• Average of remaining three numbers = 60 / 3 = 20

Therefore, the average of the remaining three numbers is 20.