Suppose a professor counts the final exam as being equal to each of the other tests in her course, and she will also change the lowest test score to match the final exam score if the final exam score is higher. If a student's four test scores are 83, 67, 52, and 90, what is the lowest score the student can earn on the final exam and still obtain at least an 80 average for the course?

Accepted Solution

Answer:   80Step-by-step explanation:The three highest exam scores have an average of 80. To maintain an average of 80, the final exam score must be at least 80.   (83 +67 +90)/3 = 240/3 = 80_____Essentially, the final exam score counts as two tests, and the lowest test score is thrown out.