SOLUTION: A student's mean score on 5 tests was 84. The student's mean score on the first 4 of these tests was 87 what was the student's score on the fifth of these tests?

Question 449738: A student's mean score on 5 tests was 84. The student's mean score on the first 4 of these tests was 87 what was the student's score on the fifth of these tests?
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
A student's mean score on 5 tests was 84.
The student's mean score on the first 4 of these tests was 87
what was the student's score on the fifth of these tests?
:
Let x = his score on the 5th test
:
= 84
4(87) + x = 5(84)
348 + x = 420
x = 420 - 348
x = 72, his score on the 5h test
:

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