Question 1195089
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A teacher determines a student's course grade by computing the mean of 4 scores: 
3 unit test scores and the final exam score. 
If a student misses a unit test, the final exam score is used once as the final exam score 
and once in place of the missing unit test score. 
What is the course grade for a student who receives scores of 76 and 80 on 2 unit tests, 
misses 1 unit test, and earns a score of 72 on the final exam?
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<pre>
As described in the problem, the teacher uses THESE scores


  1-st unit   2-nd unit    scores of the final exam        scores of the final exam
    test        test       to replace the missed test

    76           80               72                                72


So add the four numbers; then divide by 4.
</pre>

Having these clear instructions, complete the solution on your own.



Happy calculations (!)