JEE Main Scores

I don't have much idea about the WBCHSE board but considering it nearly equivalent to CBSE board getting admission in the computer engg. branch in NSIT seems tough. The cutoff for general category delhiites is nearly a rank of around 4-5k. The rank is calculated based on your performance in both boards and mains. Thus giving the score in mains which guarantees you admission in cs is tough. You can try other branches though.

The only option left for you now on the basis of the inputs is to go in for counselling based on the result of JEE Mains! Since you are from reserved category you have descent chances of getting a nit or a good Private institution! Stay confident & wait for the ranks to be out! Only way Wait! ALL THE BEST!

Average chances u may get govt. Colleges.

Check on college predictors

Please see below link
https://www.shiksha.com/jee-main-rank-predictor

With these marks, you won't be able to get admission in NSIT in the CS branch. The cutoff for general category delhiites is nearly a rank of around 4-5k. The rank is calculated based on your performance in both boards and mains. Thus giving the score in mains which guarantees you admission in cs is tough. Although you may try other colleges like those in IPU. They give admission based on your performance in their admission tests.

Can you tell me your percentile for jee and cet score.

many good B.Tech colleges organizes their own entrance exams like srm, vit,kiit etc. according to times of India survey, srm is the no.1 B.Tech college in 2016. so u can join there.

Chances is very low. u can get top pvt colleges. I.e. TECHNO INDIA, HALDIA, HARITAGE, PEC, FITU, many more

75% is not a criteria. There is a cutoff which is changed every time depending on the difficulty of the paper. Students who qualify are eligible for giving JEE-advance.