(This is actually a question and a half; Please tell me if this should be done otherwise) I have a magic deck of 60 cards. Some of them (say 25) are lands. The first card I draw has a 25/60 chance of being a land. If it is, the next card has a 24/59 chance, whereas if it's not, it has a 25/59 chance. How do you find the average number of lands in your hand? (a hand is seven cards)
How do you find the standard deviation of this? How do you graph it?