I am making a Magic deck and want to know my chances of drawing a Land card in a draw of seven cards. Since I don't expect you all to know about Magic, I will simplify this:
The amount of cards (n) is 60.
The amount of cards I can draw (r) is 7.
There are 20 of the card I want to draw in a hand of 7.
I want to know:
What is the percent chance of drawing anywhere from 1 to 7 of one of those 20 cards?
What is the percent chance of drawing 2-7 of those 20 cards?
I believe this is a permutation problem. So, please help me out here. If you can give me a formula, even if you do not give me the answer, I will be happy. I know the formula for permutations, of course.
