Hi Aspirant,
Hope you are doing great as per the question asked by you, O.U.A.T score weightage is depend on marks obtained in 10th and 12th and score obtained in entrance exam . 25 percent weightage is for 10th and 12th marks and 50 percent of marks in entrance exam, and cut off for every branch are different you should mention in which course you are trying to get. For safer side your aggregate marks should be above 70- 75.
Hope you found this answer useful. Stay motivated stay positive.
All the best!
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