Just been talking to a friend and i assumed that it was an average of the percentage of all of your marks which will then give a specific percentage therefore showing ultimately what grade you have received. However a friends stated that it was based on not a percentage average across all your marks but on an average of your grades. For example if you receive 4x2:1 and 2x 1st's your overall grade would be a 2:1 even if you received 69% for all 4 2:1 and 95% for the 1st's. Can someone confirm this for me? 
