Hi Seema,

I want to tell you that most of the mock tests available for BITSAT are made on a tougher scale than the actual exam is. Same goes for Knockout Bitsat Test series. So keep giving tests and keep on analysing your mistakes. If you are working hard and scoring decent marks, maybe about 10-20 less than your desired marks, then you are on the right track. Apart from this, it is highly probable that your score in final exam would be more than your average score in mock tests. 

Keep preparing, all the best!