1. The table below shows the number of students that made honor roll last quarter.
1. The table below shows the number of students that made honor roll last quarter. If a student is
chosen at random, find each probability. Give your answers as fractions in simplest form.
Honor Roll
Yes No
9th Grade
72
120
10th Grade
95
117
11th Grade
76
124
12th Grade
57
139
a) P(honor roll | 11th grader)
b) P(9th grader | not honor roll)