Question 817232
if the test is worth 20% then the present average is worth 80%
.80*72+.2x>=80
57.6 +.2 x>=80
your 72 average is only worth 57.6 you need to get 20% of the test that is worth 22.4
You will need to get 112 on the test
to get 75 you will need 87
with a grade of 100 on the test you would get a total 77.6