I know this might be really simple, but I get easily confused. CASE 1. I have a bag with eight marbles, one of them is green and the remaining seven are red. If you have to pick a random marble without looking, there is one in eight chances (12.5%) of lifting the green one. Is this correct? CASE 2. I have three identical bags (like the one in case 1). What are the chances of picking the three green ones? 3 in 24? (25%) this is how i though it would work out, but logically I predicted that it would have been more difficult to pick the three out of all the 24 (From three different bags), so I thought I was doing something wrong. All help will be greatly appreciated.