hello shiva,

To prepare for mba for ipu cet exam, what yiuy have to do is not to focus on the highest marks you need to score as no one know that what will be the cut off  as the cut off fluctuates every year. so all you have to do is just prepare at your best and try to answer only those question for which you think that you are sure about 100 percent.

All what matter is your rank, the good rank you will score the good college  you will get in the counselling session. as the colleges are alloted by ipu as per the rank of the students. so focus on your rank.

And i must suggest you to focus that which college you want , what is its eligibility criteria , its last year cut off, adn what are your chances of getting admission there. Start thinking of these thing this will definitely motivate you possitively. set your goals and try to achieve them efficiently. 

comming back to your question that how you can score good rank in mb aiou cet. you need to check the neggative marking first how much makrs you will gain for a correct ansnwer and how much amrks you will lose for an incorrect answer. pick up the last 10 year question papers and go through it a deep, thi will help you to know that what is thre criteria , what type of questions will come ,how many questions are there and many such things you need to keep in mind while preparing for it.

i must suggest you to take some coaching also so that it helps you to clear your exam with a good rank. because they have an experience that what type of questions come every year , what is there strategy of asking questions in an exam.so this is one of the best option whihc will help you out. 

There is no such good books for entrance exam, you need to go through the mba ipu cet latest syllybus and google the subjects , questions, last 10 year question papers. solve them and many of the sample papers are also available on internet you can go through it and solve. this will definitely help you out. all the best have a great future ahead.