hi,

see you have several options of higher study after completing 10+2 course. you may apply for b.sc in mathematics, statistics, b.math/ b.state in ISI, bachelor in computer application course , bba, integrated mba , b.a in economics, b.a in english etc.

so you need to decide which of the course interest you the most , then you may take for preparation of entrances.

hope it helps.