hi poonam,
If u r faring decently in the jq+ and marcus green then there shud be no problem.
At the end i got only 2questions wrong in the marcus green test. and i was averaging a score of about 78%.
The thing is u shud feel confident that u will definitely pass the exam; scoring depends on luck and preparartion
and as everybody has said on this site, be very calm and read every question carefully.
One thing i did was any question i found was taking to long for me to figure out, i would mark the question and carry on and then after i finished answering all the question I came back to them. This is just a suggestion; u can always comeup your own game plan.
Hope this helps.
Namrata