How to calculate total chance from different simultaneous chances

n should be 5, since i am drawing 5 cards
r should be 2, since i am trying to get 2 successes (hearts)
p= 4/52 = 1/13
q= 12/13

That would be the probability of drawing a One Pair* hand. There are 4 cards of the same rank and 13 cards of the same suit in a deck.

*fixed