The sum of the upward face after rolling 7 dice. Once again, we are quantifying an outcome for a random process. We are the random processes rolling these 7 dice and seeing what sides show up on top. And then we are taking those, and we are taking the sum, and we are defining a random variable in that way. So the natural question you might ask is, why are we doing this? What's so useful about defining random variables like this? It will become more apparent as we get a little bit deeper in probability.