What score does Joe need??

[superme]

how can I find the answer to this problem?

Joe's average on the first four exams was 86. What score does Joe need to earn on the 5th exam in order to raise his average to 87?

Help :!:

 

[Mrspi]

how can I find the answer to this problem?

Joe's average on the first four exams was 86. What score does Joe need to earn on the 5th exam in order to raise his average to 87?

Help :!:

If Joe ends up with an average score of 87 for 5 tests, he'd need a total of 5*87 points.

So far, he has an average of 86 for 4 tests, which means he has already earned 4*86 points.

How many more does he need?

 

[superme]

confused 91?

 

[Denis]

Yes, 91: why are you confused?