Hi everyone. Ive had a major block and have completely forgotton all understanding around conditional probability and theres only a day left before the exam. Im desperately trying to get some understanding back. Im looking at question 4 on september 2017 paper and i just cannot do oart 2 onwards. My initial problem is that I cant decide when i should be using which formula... P(Ae|Do)= p(Ae).p(Do|Ae) or P(Ae|Do)= p(Ae n Do)/ p(Do) Any advise or tips on understading this would be really appreciated as its quite a common topic. Thank you in advance
Personally I would stuff the whole conditional worries and draw a tree diagram. It's much much easier to work from this.