You have a deck of Magic the Gathering cards with 60 cards total. In the deck you have 20 Mana cards, 18 Spells, 3 Artifacts, 12 Creatures, 6 Enchantments and 1 Planes Walker.
What is the probability that you draw 2 artifact cards assuming that the first one is not replaced?
What is the probability that you draw 2 artifact cards assuming that the first one is replaced?