Abby, Boris, Carol, Dario, Eileen, Frank, Gina, Hideki, Irene, and Jack auditioned for a school play. The drama teacher needs to randomly choose 2 of the 10 students for the play. The table shows the ways the teacher can choose 2 of the students, where each student is represented by the first letter of his or her name.
What is the probability that Carol and Jack will be chosen for the play?
1/45
1/9
2/45
1/90