During a promotion a music store gives a free cd to every 15th customer and free dvd to every 40th customer. which customer will be the first to get both gifts?

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