In ms. morales's class, the ratio of boys to girls is 1: 4. she has 3 boys. how many girls does she have? 12 14 15 30

Given the box plot, will the mean or the median provide a better description of the center? box plot with min at 10.5, q1 at 11.5, median at 12.5, q3 at 13.5, max at 15