asanka, treimin is right. You must do a few more mock exams. If you have the K&B book then you must be having the Master Exam. Do that too and Inquisition. Devaka's examlab is a bit tough. Even I failed in the final exam of examlab (got only 61% in that but got 98% in the real exam). Most of the mock exams are harder than the real exam. If you can get around 65-70% on them, then you will definitely score above 85% on the real exam. If you want a score over 90%, then I recommend that you wait for a while and give some more mock exams and try to grab your weaknesses. Then prepare more on those topics and then go for the real exam.
And don't worry, the real exam is really simple. If you prepare more than enough like me, then you will be disappointed that it must have not been that easy
i am already in 70% range in whizlabs is it enough to pass
Asanka if you score about 70% on all the exams of whizlabs, then you will surely get 85% above on the real exam. If you want a better score, then please wait some more. Also I am again repeating that if you have the K&B book, then give the Master Exam that comes with it. Also give all the exams on Inquisition (it is free). Also try examlab...
The Whizlabs mocks are good but the final whizlabs mock exam is tougher than the 1,2,3 & 4 mock. So do try the final whizlabs mock before your exam as it will give you a better idea of where you can do some last-minute study.
Devaka's mock tests are trickier than whizlabs however it is well worth trying them so that you can get more practice.
Inquisition is about the same difficulty level as Whizlabs in my opinion