At the end of spring break, lucy left and drove home, driving at a rate of 40 mph. Lucy’s friend ethel left 30 minutes later, and drove 50 mph. How long did it take ethel to catch up to lucy?.

Asociologist chose 300 students at random from each of two schools and asked each student how many siblings he or she has . the result are shown in the table below. there are a total of 2,400 students at lincoln school and 3,300 students at washington school .what is the median number of siblings for all the students surveyed ? a)0b)1c)2d)3