SOLUTION: The Average (arithmetic mean) of a student's scores on 4 tests was 77. If he recieved a score of 69 on each of the first two tests and an 82 on the third, what was his score on th
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Question 452131: The Average (arithmetic mean) of a student's scores on 4 tests was 77. If he recieved a score of 69 on each of the first two tests and an 82 on the third, what was his score on the fourth test?
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
The Average (arithmetic mean) of a student's scores on 4 tests was 77.
If he recieved a score of 69 on each of the first two tests and an 82 on the
third, what was his score on the fourth test?
:
let x = fourth test score
:
= 77
:
= 77
multiply both sides by 4
220 + x = 4(77)
x = 308 - 220
x = 88 on the 4th test
:
:
You can check this
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