Question

Please Help...

you are studying for your final exam of the semester. up to this point,you recieved 3 exam scores of 76%,99%, and 86%. to recieve a grade of A in the class you must average exam score between 90% and 100% for all 4 exams including the final. Find the widest range of scores that you can get on the final exam in order to recieve a grade of A for the class.Use interval notation
A) [88,89]
B) [90,100]
C) [99,100]

Answer 1

The answer is C. To find the average or mean, you add up all the values, then divide by how many values there are. 76+99+86=261. 261/3=87. So, I looked at the options and did the math. 76+99+86+88=349. 349/4=87.25. When I used 90, I got 87.75. When I used 99, i got 90 total. So, C is your answer. Hope I helped!

Answer 2

The answer is B. It's definitely not A nor C.