From five flips. These aren't the possible outcomes for the random variable, this is literally the number of possible outcomes for flipping a coin five times. For example, one possible outcome could be tails, heads, tails, heads, tails. Another possible outcome could be heads, heads, heads, tails, tails. That is one of the equally likely outcomes, that's another one of the equally likely outcomes. How many of these are there? Well, for each flip, you have two possibilities.