Shirt color | Size | Large | Medium | Total
Red | 42 | 48 | 90
Blue | 35 | 40 | 75
Total | 77 | 88 | 165
If you pick a shirt at random from the given batch of 165 shirts, what is the probability that it is red and the size is medium?
a. 48/165
b. 40/165
c. 42/165
d. 90/165