Probably. I can't say yes for certain since I don't know which country the university you want to apply to resides in. In the US, a lot of business schools have programs aimed directly at working professionals by offering weeknight and weekend classes. At my work, it's very common to find people in MBA programs and they're 30s - 40s.
Also, depending on which country you're in, it is likely illegal for them to deny entry to any university based on age.