SOLUTION: 10) The average of 10 numbers is 10. What will be the new average if each of the first five numbers is increased by 4.

Algebra ->  Customizable Word Problem Solvers  -> Age -> SOLUTION: 10) The average of 10 numbers is 10. What will be the new average if each of the first five numbers is increased by 4.      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 543123: 10) The average of 10 numbers is 10. What will be the new average if each of the first five numbers is increased by 4.
Answer by jpg7n16(66) About Me  (Show Source):
You can put this solution on YOUR website!
If the average of 10 numbers is 10, then the sum of those numbers is 100.
10%2A10=100
So if you increase the 1st 5 numbers by 4 each (each means multiply), you increase that by 20
5%2A4=20
So add that to the previous sum, and divide by the same 10 numbers.
%28100%2B20%29%2F10=120%2F10=12