Respectfully, Have you ever read Google Adsense TOS before apply? You cannot place the similar kind of ads, know as PPC type with in the same page you have Google Adsense code on it. It is prohibited against Adsense TOS.
It's still debatable, Some said It's possible, some say It's possible. You can ask google adsense directly to make sure this thing.
As long as the ads is not confuse adsense ads, then you can put it However, not suggest to do that, it will give negative impact to your earning. Stick on only one PPC for individual website is always better
Well No You can't put both adsense and adbrite ads in one site . Its against Google TOS . If you put they might ban you . So beware . you can use chitika inline ads instead .
Based on adsense help page https://www.google.com/adsense/support/bin/answer.py?hl=en&answer=32849 DON.
I think you need to read properly what google saying in link just above your post (provided by me). DON.