Engineering

I'll tell you about calculation of marks and rank as well.(Engineering).
KCET Marks: Marks obtained in physics, chemistry and mathematics will be added and the maximum marks is 180.
KCET rank(engineering) : KCET rank will be calculated by considering the performances in KCET and QE (quallifying examination) as well.I will explain with an example ,let us assume that u have scored 131/180 in KCET and 288/300 in QE,then your % marks in KCET is 72.77% and in QE it is 96% now they will add this two( that is, the formula goes like this
Rank will be given
R={(%KCET+%QE)/200}100
(This is for better understanding)
In my example .
{(72.77+96)/200}100= 84.3
Then they will sort ,who has got more R(i have taken this R for better understanding) value will get good rank.
And the rank to a particular R value varies every year,
i,e. In KCET 2016 for R= 84.3 the rank was 2685.
But in KCET 2015 for R= 84.3 the rank was below 900.(as it dependent on number of candidates ,difficulty of question paper and competition level).

Yes, you can do it. Science is one of the streams in class 11th which the students have to take up once they successfully pass out of their Class 10th. It mainly consists of the subjects : Physics, Chemistry and Mathematics. Biology is also an option which can be taken in the Medical Stream. Now once you pass out of your Class 12th with the Science stream, you are eligible to take up graduation in any stream except medical (If you have not studied Biology). So if you take up B.Sc. Physics/Chemistry/Maths, this would be considered as the degree in Science stream/subjects. But coming to the B.Tech thing, it is Bachelors in Technology. This is also a Science background graduation programme, but the Degree in Science cannot be considered equal to the degree in B.Tech
B.Sc is of 3 years but B.Tech is of 4 years. Also B.Sc. Is a Science graduation, but B.Tech is a technical course. So B.Tech is more valued.