Okay, so I know this is probably a pretty easy question but I can't figure out how to do it without writing out all the possibilities and counting them up.
"Given that two fair dice are rolled, what is the probability of one of the die being twice that of the other?"
So obviously the answer is 6/36. When you write down all the combinations where this will be true, there are 6 of them.
But I don't think the question intended me to simply enumerate the outcomes that met the condition so, I have been trying to figure out some more (for want of a better word) maths-y way of getting the answer. Any ideas?