Answer:
80
Step-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.
The lowest score the student can obtain is 80
The student would take 5 tests. The total marks obtainable is 500( 100 x 5). The student wants to score at least 80 in the course. So she needs to have at least a total score of 400(80 x 5).
In this calculation 52, which is the lowest score would be excluded. This is because the professor would replace this score with her exam score. The student has the scores for 3 tests already.
Total scores of the student for the 3 tests = 83 + 67 + 90 = 240
Sum of scores on the remaining two tests = 400 - 240 = 160
Average score on the remaining two tests = 160/ 2 = 80
To learn more about determining average scores, please check: https://brainly.com/question/9849434?referrer=searchResults
