Each person in a group of students was identified by year and asked when he or she preferred taking classes: in the morning, afternoon, or evening. The results are shown in the contingency table. Find the probability that the student preferred afternoon classes given he or she is a junior. Round to the nearest thousandth. Be sure to show and explain your work. When Do You Prefer to Take Classes?

Freshman
Sophomore
Junior
Senior
Morning
19
2
6
16
Afternoon
17
3
13
15
Evening
8
14
9
7