Replying to Guessing on tests

I'm a pretty good student and have never guessed on a test before let alone a unit test but my friend did and it turns out that he was pretty lucky. It was a grade twelve unit test and he really doesn't care too much about the class. He already knows that he's probably going to fail so when I told him that our trig test was today he randomly guessed, put "1" for all the numerical responses but the one he knew (there were four and he got two of them right) and finished in ten minutes. When he got the test back on Friday he ended up with a 60% which I thought was amazing for just guessing. He almost beat the class average on the test which was 67% haha. Has something like this ever happened to any of you or someone that you know?