Best college for average student?
The admission in MBA is generally based on your performance in the Entrance exams like CAT, MAT, CMAT, XAT, SNAP, NMAT, IIFT etc. Most of the universities have set the standards of the minimum graduation marks. There are many factors for shortlisting & selection of a good B School such as Academic score, work experience, Extra curricular activity etc. After the cutoff in the particular entrance exam only matters how you perform during the interview.
If you are an average student throughout in your academic then there are many B School that offer MBA programme only you need to crack any of given above entrance exam with the required score. You can also check B School & its ratings with given below link.
Good Luck!