My advice go to the best STUDENT in the class. You probably have a good idea who has the greatest grasp of the material in the class.
It might be the frum guy , it might be one of the non-jewish girls. It might be a non-jewish guy.
Its pointless to ask for help from someone who has no grasp of the material either.
Caveat, if the person who seems to have the best grasp is Asian (or any other foreigner) , make sure they speak good english and you can understand them. When I was in college, It was hard to ask some of the Asians for help because they spoke english with a very hard to understand accent.