John earn scores of 82%, 74%, and 78% on three mid-term tests in his Math

Question

course. To earn a B, his overall course mark needs to be at least 80% and less than
90%. The overall course mark is 1
3
(mid-term average) plus 2
3
of the final
examination. In what range of values can his score on the final exam be so that he
has a B average?

Answer 1

The overall course mark is 1
3
(mid-term average) plus 2
3
of the final
examination.

Is this what you mean?

The overall course mark is 1/3 (mid-term average) plus 2/3 for the final examination.