Hi there,

Let me clear you that, with 50% marks in 12th you can surely give the JEE Mains exam. Because, to qualify for JEE Mains, there is no minimum aggregate percentage criteria,  but yes if you want to take admission into NITs, IIITs or CFTIs then you should score a minimum aggregate of 75% in your class 12th if you belongs to General/Unreserved category and 65% if you belongs to any of the reserved category.

Now as you have 50% in 12th, so while taking admission in some NIT, etc. it would be difficult for you, because you will not satisfy their eligibility criteria.

Hope it helps.

Dear aspirant,

According to your question and taking into consideration that you want to know about whether you can do mechanical engineering by qualifying jee mains.

I would like to tell you considering your 12th percentage that it is very less and the minimum criteria required is 75% to get admitted in these institutes.