The given cut-off is based on the last year’s official UPSC CSE cut-off. Many experts said that a slight variation of 5 to 10 marks is expected this year (as compared to the last year's cut-off)
However, considering the above-average difficulty level of the question, there is a high possibility that UPSC Prelims 2020 Cut-off will more or less remain similar to previous year's cut-off.