Hello,
I'm unsure of why you are confused but don't worry, I'm here to help. So basically, the requirement in getting into the college is that you must have 50% marks, now 50% doesn't mean 50 marks. If your total marks is 100, then the 50% marks is 50 but if your total is 80, as in your case, then your 50% marks is 40. I hope this clears your doubt..
Thank you
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