A box conains 8 tickets. Two are marked 1, two marked 2, two marked 3, and two marked 4. Tickets are drawn at random from the box without replacement until a number appears that has appeared before. Let X be the number of draws that are made. Make a table to display the probability distribution of X.
Only part of the answer is given, P(x=2) = 5/35. Ive been trying to figure out how they got this ... where does the 35 come from?