Mr. bryant is trying to figure out which class project to work on for community service. he surveyed the junior and senior students about their preferred project. the frequency table shows the responses of the students.

juniors seniors total
park cleanup 30 26 56
food kitchen 50 34 84
clothing drive 10 50 60
total 90 110 200

determine the joint frequency of being a senior and wanting to have a park cleanup. explain what this answer represents.