Question

You are studying for your final exam of the semester. up to this point,you recieved 3 exam scores of 83%,85%, and 84%. to recieve a grade of B in the class you must 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 recieve a grade of B for the class.Use interval notation ...?

Answer 1

The widest range lies between [68,100]

Explanation:

Given is - to receive a grade of B in the class you must average exam score between 80% and 89% for all 4 exams including the final.

So, the range of the addition of all 4 scores is -

`80*4=320`

`89*4=356`

Now given scores addition is =
`83+85+84=252`

Now, the widest range of scores that you can get on the final exam in order to receive a grade of B can be found as :

`320-252= 68`

`356-252= 104`

So, the range lies between [68,100]

Answer 2

[68,100]

This will allow you to get a B score.

To solve find the medium by adding the values divided by 4, solve for the unknown of the final exam, with the minimum value equalling 80, this will give you 68.