Question

How bad would this affect my grade?

I have a 72% in Geometry. My final is worth 26%.
If I only got, lets say, half of the questions right, how much will it affect my grade?

Answer 1

half of 26%=13% so

72%+13%=85% still a good mark,

Answer 2

but if you get them all right

72%+26%=98%
a brilliant mark