Question

In a first semester unit there are four tests each of equal weight i.e. each worth 25%. Your average on the first three tests has been 62%. You need to get an overall average of 65% to proceed to the second semester.
What percentage should you try to get on the fourth test?
Please show your work.

Answer 1

looks rather straightforward ...

(62+62+62+x)/4 = 65
186+x = 260
x = 74

Answer 2

Thanks Reiny