The sum of five numbers is 555. The average of first two numbers is 75 and the third number is 115. What is the average of last two numbers?
The sum of five numbers is 555. The average of first two numbers is 75 and the third number is 115. What is the average of last two numbers?
Explanation
The sum of five numbers is 555.
The average of the first two numbers is 75, so their sum is 2 x 75 = 150.
The third number is 115.
So, the sum of the first three numbers is 150 + 115 = 265.
Since the sum of all five numbers is 555, the sum of the last two numbers is 555 - 265 = 290.
Therefore, the average of the last two numbers is 290 / 2 = 145.
The correct answer is: 145