But that would have been a random variable. Notice, we have taken this random process, flipping a coin, and we've mapped the outcomes of that random process. And we've quantified them, 1 if heads, 0 if tails. So we can define another random variable, capital Y, as equal to, let's say, the sum of rolls of, let's say, 7 dice. And when we talk about the sum, we're talking about the sum of the 7. Let me write this. The sum of the upward face after rolling 7 dice.