You are studying for your final exam on the semester. Up to this point, you received 3 exam scores of 96% ,77%, And 74%. To receive a grade of B in the class, you must have an average exam score between 80% and 89% for all 4 exams including the final. Find the widest range of scores that you can get on the final exam in order to receive a grade of B for the class. Use interval notation

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12-12-2018
Mathematics

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You are studying for your final exam on the semester. Up to this point, you received 3 exam scores of 96% ,77%, And 74%. To receive a grade of B in the class, you must have an average exam score between 80% and 89% for all 4 exams including the final. Find the widest range of scores that you can get on the final exam in order to receive a grade of B for the class. Use interval notation

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kaylaherrera94 kaylaherrera94 · Answer 1 · 2018-12-13T15:53:15+01:00

what is the percentage of your grade worth for the three exams? Like for example, my final exam in english is worth 20% of my final grade. If you don't know, my best guess is that with the three tests, they're each worth 33.333333%, so the first three average out to about 81% as your final grade. In order to recieve a B as your final grade in the class, we have to now assume that each of the four tests grades are worth 25% of your class. and the lowest percentage for a B is 79.5%. So you would have to get a minimum of 71.1% on your fourth test to get a 79.5% in the class. The highest you can get on your exam and for your grade to still be a B would be a 99.9%, so almost a perfect score. Your final answer is 71.1%-99.9%, based on my guessing in some areas.