Hi sonu.singhal84,
Thanks for writing in. Without knowing much about your work experience or more details on your post-MBA goals, it's hard to give a complete profile evaluation.
With the schools you mention, if you can break a 700 on the GMAT, your score should be competitive at all the schools you mention. With CMU and UNC a mid-600s score should still have you in the competitive mix.
Best of luck,
Daniel Richards
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