My son is year 12 and has just received his mocks results. He got an a in business, b in geography, c in psychology and a b in core maths so a total of 136 points. He will obviously work hard to improve the psychology although he seems to think his school will let him resit at the end of the summer term. What now? He has his eye on a course that requires bbb. He will have enough points but not three bs. Would an a cancel out a c? Many thanks