CAT

The weights assigned are changed every year. For PGP16-18 course, please refer to the link.
http://cdn.iimkashipur.ac.in/media/admission/Admission_Policy_16_18.pdf
Yes it is possible provide one compensates for those in other areas such as WAT/PI

Actuarial Science

CAT is one of the toughest exam for MBA admissions in IIMs and many other MBA institutes.You have to be good in all your concepts and study hard. Go through the previous year question papers and try to solve them, then you will understand where you have to improve and where your strength lies. Practice and study hard.
All the best.

The total tuition fee for 1 year is Rs 2,75,000, which makes the total tuition fee Rs 5,50,000. No, CAT is not necessary, however you are required to write a SRMCAT entrance exam.

Yes, possible. The specified cut off is 85 percentile. The net aggregate of your academic and non academic profile is considered and hence you could be considered for the call.

You should prepare well first with all subjects, and Start giving weekly Mock Tests. After A month, Start givibg 10 tests a Month and keep rectifying your mistakes.GoodLuck.

CAT is for management programme like MBA, whereas GATE is for technical program like M.Tech. Both for Post Graduation programs, So choose wisely accordingly to your interest.

RS Agarwal is standard book for Good practice. However, TIME Coaching Institution provides best learning materials and solutions key, Where you can get best feel of CAT.