Problema Solution
On two examinations, you have grades of 81 and 90. There is an optional final examination, which counts as one grade. You decide to take the final in order to get a course grade of A, meaning a final average of at least 90.What must you get on the final to earn an A in the course?
Answer provided by our tutors
Let 'x' represent the grade on the final examination.
(81 + 90 + x)/3 >= 90
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click here to see the inequality solved for x
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x >= 99
You must get at least 99 on the final to earn A in the course.