Problem
Four numbers are written in a row. The average of the first two is , the average of the middle two is , and the average of the last two is . What is the average of the first and last of the numbers?
Select an answer
Four numbers are written in a row. The average of the first two is , the average of the middle two is , and the average of the last two is . What is the average of the first and last of the numbers?
Select an answer