I current have an 85% in his class but my final is pass or fail. I’m horrible at math and have really tried my hardest to get that b but my professors math final is either you pass it or if you fail it, you fail the course! Is allowed? I also asked around and it seems he’s the only professor that is doing this.
Why wouldn't it be allowed?
- Legally? You didn't say what country you are in, but I'm not aware of any country that regulates courses at this level.
- Your university's rules? You didn't say what university you are in, so it's impossible to say for sure. In general, though, the "instructor of record" has the authority to make decisions about how a course will be graded.
Broadly speaking, this does not seem like a bizarre policy that some wacko professor implemented; I've actually seen this in other math departments. I guess the philosophy is that most entry-level math courses are about skills: they do not want to pass you onto more advanced courses unless you know these foundational skills well enough to do them in a measurable way. (I realize that you may not personally plan to take more advanced courses, but the principle is the same).
Anyway: yes, unless your university has a policy that forbids it (e.g., a policy saying that all professors of a given course have to grade the same way), this policy is almost certainly allowed.
Since you asked your question so general (without specifying a country), I can also answer: yes, they can. In my country, for example, lecture courses are to be graded by only one single final exam.
It may be that this is not the case in your institution and that your professor is not allowed to grade in this way. Note, however, that many professors do weird things while nobidy cares. (I had a professor who openly annoced that women should not be allowed to study and all women failed his course, it was widely known, but nobody cared. This is of course an abosolutely horrible and extreme example - I also had other professors who went over the rules and nobody cared.)
So what I advise you is: Don't just ask "around", but ask specific people who know these kind of issues are are sympathethic to you. For example, your student's union or your academic advisor. Those people should know if this grading is allowed, and, if no, if it is possible in your institution to do something against it.