If we assume that 21% of these 120 people should have gotten sick, what would have been the expected value right over here? So let's just multiply this 21% times 120. That gets us to 25.3 people should have gotten sick. So the expected, so let me write it over here. I'll do expected in yellow. So the expected right over here, if you assume that 21% of each group should have gotten sick, is that you would have expected 25.3 people to get sick in group 1, in herb 1 group, and then the remainder will not get sick. So let's just subtract, or I could actually multiply 79% times 120.