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)?
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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) (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. ☺☺☺☺
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