Explanation
Understanding the Basics
To calculate the probability, we need to understand the basic properties of a deck of cards. A standard deck consists of 52 cards, with 4 suits: hearts, diamonds, clubs, and spades. Each suit has 13 cards.
Calculating the Probability
We are looking for the probability of drawing 2 hearts sequentially without replacement.
StepbyStep Breakdown

Total Possible Outcomes: The total number of ways to draw 2 cards from a deck of 52 is given by the combination formula:
$\binom{52}{2} = \frac{52!}{2!(522)!} = \frac{52 \times 51}{2 \times 1} = 1326$ 
Favorable Outcomes: The number of ways to draw 2 hearts out of 13:
$\binom{13}{2} = \frac{13!}{2!(132)!} = \frac{13 \times 12}{2 \times 1} = 78$ 
Calculate the Probability:
The probability $P$ of drawing 2 hearts in a row is the ratio of the number of favorable outcomes to the total possible outcomes:
$P(\text{2 hearts}) = \frac{\binom{13}{2}}{\binom{52}{2}} = \frac{78}{1326} = \frac{6}{102} = \frac{1}{17}$
Final Result
Therefore, the probability of getting 2 hearts in a deck of cards is:
$\boxed{\frac{1}{17}}$