Hmmm well I'm not very good at maths, I got an A in Numeracy, though, but I'm guessing somewhere in the low to mid eighties (83-87) to bring your grade up to a 70% average, which is 1st. This is because you got low 60s in two of them so you'd need a high grade. However, this is the maths for 20 credits, for fourty, because it's worth double I would aim for around high 70%s so maybe 76-79 just to secure a possible first. All you have to do is study a little harder. But you shouldn't really try and aim for the lowest possible needed mark for a first, but for the highest. Next year I would say that you'd need ALL of your work to be of a first standard, so over 70% in order to get a first. You'd need to balance one module next year with a 62 with another module with somewhere in the mid to high eighties. So just aim for consistency, not better or worse. But if you do find yourself in this position, at least you have some idea of what to do.