i failed in 12th class in 2018 and than i reappeared for 12th in 2019 and secured 84% marks....can i apply for jee mains exam in 2020 ?
As per your question you can give JEE MAINS in 2020.
And you need to score 75% which includes physics, chemistry, maths,one language and other subject.
So,this criteria is satisfied .
You can work hard and try to score good to get good NIT next year.
All the best and stay motivated.

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