Actually I am having only the knowledge of the pass out studies so can you tell me which books are helpful for this exams

you can use handbooks of various coaching institutes moreover one can also buy the handbooks of Arihant publications for quick revision.

since you have 15 days I would like to assist you that try to practice questions of the chapters which you think you know and have solved earlier with

Crash course is a short term program where an student will get summarize discussion of entire syllabus, highlights of each topics, material with most important and conceptual questions, a team excellent in short term program, tricks and tips to attend questions in easy way and most importantly complete discussion of

Qualifying mrks is not fixed. It varies every year depending upon the question types and question patterns and how easy or hard was the question these things.

You should start with the basic matthematics part or basic things of your departmental subjects.

Dear Madhurima,

You are preparing for which exam?

JEE Main and AIIMS are UG level exam and CAT is PG level exam. 

Hi,

UGC NET exam conducts for two papers, Paper1 for general aptitude and Paper2 for your selected subject. Multiple study materials are available for UGC NET Paper1 but candidates should choose the best books for UGC NET exam for the preparation. Below are some best books for this exam preparation:

Do a systematic study . Find a place you are more comfortable with , like a study hall or library that is close to your home. Have the will to concentrate. Set a goal and fix your mind on it. It doesn't matter if  you don't have physical strength .

For chemistry its definately enough,Maths to some extent.Maybe 40-50% will be of ncert level. For Physics its 20-30%. 

Chemistry will make you clear the cut off. maths and physics will give you a higher rank