This is 6 divided by 3 is equal to 2. Now, what is the mean of our xy's? Well, over here, it's going to be, so our first xy over here is 1 times 2 plus 2 times 1 plus 4 times 3. And we have 3 of these xy's, so divided by 3. So what's this going to be equal to? 2 plus 2, which is 4, 4 plus 12, which is 16. So it's going to be 16 over 3.