So M is particular ticket right over here. So let's just say X is the random variable, it's the net profit from playing this ticket. What I want to think about in this video is what is the expected value of that? What is the expected net profit from playing 0 for R? I encourage you to pause the video and think through it on your own. So let's think about what expected value is. It's the probability of each of those outcomes times the net profit from those outcomes.