A card is drawn at random from a well-shuffled pack of 52. Given that it is a king or a heart, what is the probability that it is the king of hearts?

Explanation

1. 01

   Kings or hearts: $4 + 13 - 1 = 16$ cards, with the king of hearts counted once.

2. 02

   Only one of the 16 is the king of hearts: $\frac{1}{16}$.