Hello Ashok Manickam. Thanks for contacting Careers360 and we hope we will be able to answer your query. 

Note that the admissions to the IITs are only on the basis of JEE Advanced, the toughest entrance exam in the country! So, the level of input you should put into your JEE preparation should be quite high. 

So, I would like to direct your attention to this Careers360 article for more information about the cutoffs for IIT Delhi B. Tech in Production Engineering:

• https://engineering.careers360.com/articles/jee-advanced-cutoff-for-iit-delhi

Hope this helps you and all the best!