The individual events of drawing either an ace or a king from a regular deck of cards are non-overlapping because an ace and a king are different cards.
To find the probability of the combined event, we need to calculate the probability of drawing either an ace or a king.
There are 4 aces and 4 kings in a deck of 52 cards. So, the total number of favorable outcomes is 4 (ace) + 4 (king) = 8.
The total number of possible outcomes is 52 (total cards in the deck).
Therefore, the probability of drawing either an ace or a king is 8/52, which can be simplified to 2/13.