That’s only my peronal experince and that’s in the UK.
Here’s my experience:
I graduated from UPenn with a degree in English (Medieval/Renaissance Lit). I have begun the MBA (Masters in business administration) program at Arkansas State University.
To be in the program, I had to take several ‘fast-track’ classes that covered the basics of undergrad business (macro/ micro econ, accounting, stat, management, marketting) and then begin my graduate coursework. this may be a unique feature of this program, but I am inclined to think that many vocation-oriented masters’ programs offer ‘fast-track’ coursework for people with little undergrad credit in the field.