math
posted by jack .
i have 78% in the course
the exam is worth 30% and i got 65%
what is my overall mark in the course

We have to make a few assumptions baed on the vagueness of the question, but ...
The tests break down into two classes: the final exam and all others. The final exam is worth 30% of your overall grade, and the others, combined, are worth 70%.
So your overall grade, G, is 70% of your nonexam percent, 78, plus 30% of your exam score, 65.
G = 0.7(78) + 0.3(65)
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