A group of students took an exam, and their grades and class are summarized below. А
B
Total
5
3
19
Freshman
Sophomore
Total
с
11
13
24
6
7
10
26
45
11
If one student is chosen at random, find the following probabilities.
Give each answer as a fraction, or round it to 3 places after the decimal point, if necessary.
(a) Find the probability that the student got a 'B' or is a freshman.
(b) Find the probability that the student got a 'C' given they are a sophomore.