Question about Facebook posts

Neither.

The next time you post, a small portion of the people who have liked your page and are most actively engaged with it will see your post. If these people respond well to your post, it will then be shown on more of your fans' timelines (and may also appear in their friends' timelines if they shared the post). If these people also respond well to your post it'll be shown to even more of your fans (and their friends) and so on.

There are three points to consider here:

1. Generally speaking the people who are shown your posts are limited to people that have liked your page not those that have liked your posts (except in the case of shares as noted above)
2. The more someone engages with your page the more likely he or she will see your content
3. The more people engage with a specific post, the more likely that that specific post will be seen (either by your fans or by their friends as shares)

Just a note, the above is more or less correct, though it's actually a little bit more complicated than that (e.g., Facebook prioritizes videos directly loaded to Facebook over YouTube videos; posts that get a lot of comments saying "Happy Birthday" or "Congratulations" may be seen by more people, etc.). If you're interested, do a search for "Edgerank" and you'll find plenty of resources on how Facebook's algorithm works though you should know that while we know certain things about Edgerank because of what Facebook has told us (like the video prioritization above), other things are based on speculation and less-than-scientific experiments (like the "Happy Birthday" comments mentioned above. Personally, I'd rather spend more time creating engaging content than trying to read Zuckerberg's mind, but that's just me...