SOLUTION: Average of 5 numbers is 80.If three of these are 70,80 and 90.Find the average of last two?

Algebra ->  Average -> SOLUTION: Average of 5 numbers is 80.If three of these are 70,80 and 90.Find the average of last two?      Log On


   

Question 794831: Average of 5 numbers is 80.If three of these are 70,80 and 90.Find the average of last two?
Answer by Cromlix(4381) About Me  (Show Source):
You can put this solution on YOUR website!
Average of 5 numbers is 80
Total of 5 numbers = 80 * 5 = 400
70 + 80 + 90 = 240
400 - 240
=160
Average of the last two numbers is;
160/2 = 80.
Hope this helps.
:-)