Vinod
If I were you, I would be very concerned with such a low score on Marcus' exam. You definitely need to put in more effort before you take the exam. But well I think if you are lucky you might manage to slip through ! ... just kidding
I personally think that you are the best judge of your knowledge and abilities. Others opinion doesn't really matter now especially when you just 2 days away from the exam. I would feel very confident if I score 92% on Marcus's exam.
All the bests for your exam .. I'm sure you'll get a good score.
Regards
Harwinder