What is the probability of drawing 2 hearts in a deck of cards?

The probability of drawing the two of hearts is 1/52.

The probability of drawing two cards that are hearts depends on whether or not the first card is replaced.

If it is replaced, then the probability is (1/4)*(1/4) = 1/16 = 0.0625

while if it is not, the probability is (1/4)*(12/51) = 3/51 = 0.0588 (approx).