Well, I'm not in Algebra II yet, but I think I may know the answer to this one.
11/12 of the students are excited. This means that 1/12 of the students are not. that 1/12 accounts for 10 students. So, we can use a porportion:
10/x = 1/12
x = 120
There are 120 students in total.
Now we find 11/12 of the students, which are the students that are excited.
10(11) [I simplified it.]
110 students are excited for the project.
I'm open to any critiques, again I'm not yet in Algebra II.