Academic Year Males Females
Freshmen 9 10
Sophomores 18 5
Juniors 12 16
Seniors 17 19

Mr. Connor's business class has 106 students, classified by academic year and gender, as illustrated in the table. Mr. Connor randomly chooses one student to collect yesterday's work.
What is the probability that he selects a female, given that he chooses randomly from only the sophomores?