What is the probability of drawing a Heart **or** a King from a shuffled poker deck?

4 cards are drawn from a shuffled poker deck. How many possible combinations of these cards (without regard to order) are there?

You are playing a game of Five-Card Draw poker. You are dealt the following hand:

During the draw phase, you discard the \(2\clubsuit\) and \(\text{Q}\spadesuit\) cards and request two new cards.

What is the probability that you will improve your hand to a *straight*?

**Note:** You have no knowledge of the cards the other players have.