SOLUTION: If airthmetic mean of n(unknown)numbers is 8 and we add a new number 28 ther airthmetic mean becomes 9 tell the numbers(n)?

Algebra ->  Customizable Word Problem Solvers  -> Numbers -> SOLUTION: If airthmetic mean of n(unknown)numbers is 8 and we add a new number 28 ther airthmetic mean becomes 9 tell the numbers(n)?      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 1076472: If airthmetic mean of n(unknown)numbers is 8 and we add a new number 28 ther airthmetic mean becomes 9 tell the numbers(n)?
Answer by jorel1380(3719) About Me  (Show Source):
You can put this solution on YOUR website!
8(n)+28=9(n+1)
n=28-9=19
There were 19 numbers to begin with. ☺☺☺☺