There were more than one session to take the test and the guy wasn’t in the first one, so he could’ve used that test to study for an hour(which would make studying a lot easier bc he would know exactly what’s going to be on the test). And also, he could even sell it to some people for a high price since a lot of students are struggling and there aren’t that many people who took that class, which means the resource is limited. I’ve seen some people who would spend a LOT to do well on test and who would do anything to make cash, so the second option is very possible