Answer:
Step-by-step explanation:
2 = u - 12/ 3
2 x 3 = u - 12
6 = u - 12
6 + 12 = u
18 = u
hope that helps uh :)
It's D, because the mean doesn't matter as much if it's only taken in a small variability. The mean was selected from 25 random pages in the book, that is why it is right.
