So eight of these 20 outcomes. And if these are all equally likely outcomes, that means there's an 8 20th probability of a wand that will be made of holly or unicorn hair. So this is 8 20th, so that's the same thing as 4 10th, so 40% chance. Now the wand that selects Harry will be made of holly and unicorn hair. Well holly and unicorn hair, that's only one out of the 20 outcomes. So this of course is going to be a higher probability. It actually includes this outcome, and then seven other outcomes.