Alottery offers one $1000 prize, one $500 prize, and two $50 prizes. one thousand tickets are sold at $2.50 each. find the expectation if a person buys one ticket.

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