SOLUTION: the mean of 4 test scores is 90. What is the sum of the scores?

Algebra ->  Average -> SOLUTION: the mean of 4 test scores is 90. What is the sum of the scores?      Log On


   

Question 458350: the mean of 4 test scores is 90. What is the sum of the scores?
Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
We can call the test scores t_1, t_2, t_3 and t_4, and if the mean is 90, then



Multiplying both sides by 4,



So the sum of the test scores is 360.