How do I solve this?

Question 8 1 pts A company sends 40% of its overnight mails via express mail E1, 50% of via express mail E2, and the rest via express mail E3. Of the mail sent via E1, 2% arrives late, whereas only 1% of the mail sent through E2 arrives late, and 5% of the mail sent via E3 arrives late. What is the probability that a randomly selected overnight mail arrives late? O 0,019 O 0.018 O 0,013 O 0.020