I got R.T in maths but passed overall so can i eligible for du jat bba ?
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No you are not eligible in DU JAT because in the eligibility criteria its mentioned that the minimum marks requirement in 10+2 is 60% in aggregate of four subjects i.e., Mathematics, English and any two subject which are available in the list provided by the university (for the list you need to visit the link i will provide below).
As a result you have RT, so you aren't eligible for DU JAT 2021.
To know more about DU JAT 2021 and the subject list visit the link below:
I hope this answer helps. All the very best for your future endeavors!