The grading scheme for a Stat 100 class is as follows: 20% Assignments 80% Best 3 out of 4 Exams Suppose a student scored 85% on the assignments, and their four exam grades (out of 100) are 85, 55, 76, and 12. Use a weighted mean to calculate their grade in this course. Round to the nearest whole number. Grade = Obviously the student didn't really prepare for the last exam. Suppose they had put more effort into this exam. What is the minimum grade they would have needed to get on this exam in order to get an 80% on the entire course? Exam 4 Grade = Hints: 1) If you're uncomfortable setting this up as an algebra equation, you can also use a guess-and-check approach. 2) Remember that you can only get whole marks on the exam (you could not, for example, get a 72.6.... you would get a 73 instead). By the same token, if you got a 79.5% (or above) on the entire course, this would also be rounded up to an 80% grade on the course