if i get comparatively less score or rather avg score how i should decide which companies to actually apply for on all india basis.??

Start applying to medium level companies, for jobs you are really interested in. Best course shall be to identify their activities, train yourself additionally for some specialized services, and I am sure you will succeed.

Various companies has publish their detailed job advertisement which includes minimum qualification with percentage, age, exp. etc.. You can choose which companies job requirement suits to better then you can apply for the particular job.