Question

The average of eight numbers is 20. The average of five of these numbers is 15. The average of the remaining three numbers is

• A. 27.33
• B. 29.33
• C. 30.33
• D. 28.33

Answer 1

Answer:

D. 28.33

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 = 15

• Total sum of five numbers = 5 * 15 = 75

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 - 75 = 85

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 = 85 / 3 = 28.33 (approximately)

Therefore, the average of the remaining three numbers is 85/3 or approximately 28.33.