placements at low academics score, is it possible ?

I have 89 and 90 percentage in 10th and 12th respectively but I have only 57.5 % in B.Tech. Now I am worried about If I anyhow made it into a top B schools then what about placements. Is it possible to get a good placement, as many companies put a eligibility criteria and at the lowest they put 60% in graduation, where I will be out. So, my whole MBA prep and MBA program everything will be a waste of energy, resources, & time.

Please help me through this.