I have had exams last June and I didn’t have good material to study from. Upon speaking to my friend she gave me the studying material (notes) she got from a private tutor. That private tutor sells these notes but I didn’t know, otherwise I would have purchased them. Furthermore, she gives classes and these notes come with her classes. I used these notes for a bit but I’m retaking that exam again. I contacted the teacher a few days ago and she said she doesn’t want anyone to repeat that again but she said “no worries” when I asked her if it’s halal on me

It should be fine if she said that there is no problem