Hi smeenakshi76,
Since it's been over 1.5 months since you posted, my guess is that you've already made a decision and are currently studying. If you find that your Quant score is still lower than you want it to be, then I have some suggestions that would probably help.
Since you're focused on the Quant section right now, I'm curious how you've been doing on the Verbal section.
How have you been scoring on your practice CATs?
When is your Official GMAT?
What is your overall score goal?
GMAT assassins aren't born, they're made,
Rich