You are NOT given the mark of the equal ranked exam mark at all.
Except for 1st and last the rest on the internal marks are determined by the rank and the relative gaps between you and those students around you according to the school and you always keep your own exam mark.
Your internal mark will be one that reflects the gaps between you and the 39th person. If the school sent you in 1 mark behind that person you will stay one mark behind that person even though the 40th exam rank might be 10 marks behind.
Except for 1st and last the rest on the internal marks are determined by the rank and the relative gaps between you and those students around you according to the school and you always keep your own exam mark.
Your internal mark will be one that reflects the gaps between you and the 39th person. If the school sent you in 1 mark behind that person you will stay one mark behind that person even though the 40th exam rank might be 10 marks behind.