If you explained why saying 2 boxes = 20C3 then probably 5 but if you just wrote out the equation then probably 3/4. Don't worry at least you weren't like me and make p 1/3 and 2/3 - f******* ratios. On that note will that affect all of my questions on probability or will it just be error carried forward so no more penalised?
That's right so 5 (I know that seems generous but that's the way it is).
Thanks! Prediction for the A boundary? Previous years have ranged from 67-74 but I think this has been the worst by some distance, expect 67+-1, hoping for 70 marks for myself
For question 11 iii isn't 2.5 the X coordinate? So wouldn't you sub it back into -2x^2+10x-8 to get the Y coordinate (ie the maximum height) which would give you 4.5?