OCR D2 May 24th 2017

I hate d2 so I'm pretty nervous for this. The last two paper should have been decent so hopefully this one should be similar

Dont want to jinks myself but im feeling okay, i think its the nicest maths exam im sitting this year. I self taught it though so thats making me a little nervous!

Yeah I agree, it's a good module imo. Why did you have to teach yourself?

Basically i realised i couldnt think of anything worse than sitting m3, which the rest of my fm class was doing! I think it was a good choice but it meant i am the only person in my school taking the exam

Has anyone done the d2 Solomon paper A.
I'm struggling with 5(b)

in part a you should have found p by finding the intersection between two lines represting e(x) for two of y's stratgies,find the e(x) when the stratagy you found for x is used and this should also be the e(x) for y's optimal stratagy. the only two of y's stratgies you need to look at are the two that made up the intersection in part a) and for each of them you just do 4q -3(1-q)=e(x) or whatever and solve for q. if you get the same for both you've probably got the right answer! (sorry if this is vague, i wasnt sure if you wanted to know the answer to part a, i can clarify more if you want) hope this helps

Thanks so much!
Any predictions for what type of questions we might get?

in part a you should have found p by finding the intersection between two lines represting e(x) for two of y's stratgies,find the e(x) when the stratagy you found for x is used and this should also be the e(x) for y's optimal stratagy. the only two of y's stratgies you need to look at are the two that made up the intersection in part a) and for each of them you just do 4q -3(1-q)=e(x) or whatever and solve for q. if you get the same for both you've probably got the right answer! (sorry if this is vague, i wasnt sure if you wanted to know the answer to part a, i can clarify more if you want) hope this helps

Hmmm

So y shouldn't play y3 at all?
I've never really come across a similar question

You only consider the stratagies that were involed in the maximin intersection that you found! I think in the question it was y2 and y3 but i might be misremembering! But yeah, essentially y only plays two of their stratgies. I dont think ive seen a question where you needed to do that in the past papers but its part of the course so it could come up. I had complety forgotten about it untill you asked about that question tbh.

Do you guys show the floats when drawings cascade diagrams?

Can we do bipartite graphs in pencil?

Does anyone have a certain way to go about the schedule questions? Always spend far too long on them to get it wrong in the end