Question

To get a grade of c in your course you must average at least 75% on 4 exams. you have taken the first three exams and gotten scores of 68,78, and 81. what must you score on the last exam to get a c or better

Answer 1

The total of the scores on the 4 exams must be at least 75 x 4 = 300.
The total scores in the first 3 exams is 68 + 78 + 81 = 227.
Therefore the minimum score needed on the last exam is 300 - 227 = 73.

The answer is a score of at least 73.