Question

A student's grade for the four quarters are 95, 83, 91, and 85. What does the student need to earn on the final exam to have an overall B average (85 to 92 inclusively) for the year?

Answer 1

The least score the student can get is 71 to get an overall B average at the end of the year.

Explanation:

Let the score she needs to get be = x

We now have to take the mean of all the five subjects (including x) and equate it to the least score she can have to get a B grade.

Let us take the least score the student needs to get a B grade to be 85

Mean of all 5 scores =

`(95+83+91+85+x)/(5)=85`

`(354+x)/(5) =85`

`354+x = 425`

`x = 71`

The least score the student can get is 71 to get an overall B average at the end of the year.