Hi vishalsaxena,
Since you posted this in another Forum on this site, I've copied my response from there:
The M7 Schools are all highly competitive, so beyond having a strong GMAT score, you have to make sure that you have a strong OVERALL profile AND that you present yourself in the proper way.
That all having been said, a 610 is a good 'baseline' CAT score (the average score on the Official GMAT hovers around 540-550 most years). To score 750+ though, you'll have to make some BIG improvements to how you handle the Verbal section (and you'll probably need to 'squeeze' a few more points out of the Quant section).
I'd like to know a bit more about your overall situation:
1) When are you planning to apply to Business School?
2) When are you planning to take the GMAT?
3) How much time can you commit to studying during a typical week?
GMAT assassins aren't born, they're made,
Rich