Quote by johnsa9
You have a standard deck of 52 cards and you draw 10 without replacement.
What is the probability of drawing four of the same rank? (ex. 4 aces)

Hi johnsa9! Welcome to PF!
Is this an exam question, or did you just make it up?
Exam questions are usually less complicated than this (in the sense that they don't involve too much numberslugging).
You have to count all the ways of drawing 10 cards (which is easy!), and all the ways in which 4 of them are the same (which is really complicated).