Correct answers were visible in a test; should I notify my instructor? In a multiple-choice test at my nursing school, our teacher accidentally left the right answers in bold; not super dark bold, but dark enough for people to figure out. To add insult to injury, the week before, she had given the same exact exam to another class, who had spread the word to some people in my class that the answers were in sight. I, of course, was livid because I got an 88 and 95% of the class got a 100. You would think the instructor would find it a bit odd that so many people got the whole exam correct. Anyway, I am really tempted to notify her, but I know that my friends would hate me, and we may have to retake another and more difficult exam. Should I just take the 88 or speak up about the mass cheating that occurred? 

So far, the school really emphasizes on ethics and doing what is right. I am one of those people who covers the answers with my scantron before I make my choice, hence, I do not laser focus on the answers.
My guess is that it would be appropriate and pretty safe to note to your instructor that "some students" noticed that the correct answers were printed in bold. Sort of a "heard it on the grapevine" comment during an office visit. You could add "didn't notice it myself, hence the lower grade." 

The instructor will take some action or not, but you will have done your duty. 

You might, of course, know more about personalities that would make this unsafe for yourself, in which case, possibly let it go. 

But if the instructor doesn't know about it then it will probably happen again. 

I think this is a more serious issue in a medical related field, where people need to know things, not just get good grades. 

It might also be a judgement call as to whether this is "cheating". The others just noticed an anomaly.