IIM

Arun sharma books are best for all 3 segments I.e quant, verbal, logical. You can also refer to study material of some coaching institute

no necessary. bt,min % must be 60% above.
and try cat 95% above.

IIM cannot help you there. IIMs only serve post graduate courses. You are talkin about undergraduate programme Economic Hons. After completing UG programme, you can sit for compititive exams to get into IIM for PG courses like MBA.

Hello dear,every iim sets different criteria for selection.Cut offs also varies.Some of them give more stress on work ex,some of them on academics and extra curricular.You have to sit for cat first then according to the cut offs they will call you for gd/pi process.After this they will release a list. Best of luck!

You know both your strengths and weaknesses to crack IIM. Maintain edge of your strengths and draw a plan to overcome your weaknesses. If you have a good plan you will succeed. You may also take help of a coaching Institute to overcome your weaknesses.

IIM Lucknow. It's not the best, but should be better than st. Xavier in terms of various parameters. Although both the colleges are, I'm sure, well-equipped with all necessary facilities, etc. Faculty and placements at IIM Lucknow are better.
Having said that, its not harmful to take advise from St.Xavier's student as well.