Hi Akash, it is ok that you have scores less than 70 percentile in some exam. But from that it understands that more efforts need to put in order to push for higher percentile. MICA is also one of the toughest mba entrance exams and in my opinion it is better to prepare much better and give it a shot next time around. But anyhow it all depends on one's potential interest. If you have the confidence that you can clear and you are strong with all the basic concepts you can give a try.