A principal receives reports from teachers via email. the probability model describes the number of emails the principal may receive in a day. emails received 0 1 2 3 4 5 p(x) 0.05 0.15 0.35 0.25 0.15 0.05 how many emails would you expect the principal to receive each day? (2 points) 3.9 3.65 3.25 2.9 2.45