EASY The probabilities of having 0, 1, 2, 3 or 4 people waiting in line at a grocery store are shown in the probability distribution below. What is the expected number of people waiting in line, rounded to the nearest tenth?

The line plot below represents the number of letters written to overseas pen pals by the students at the waverly middle school. each x represents 10 students. how many students wrote more than 6 and fewer than 20 letters. a.250 b.240 c.230 d.220