In a U of A class of 30 students 11 read Arizona Daily Wildc

In a U of A class of 30 students, 11 read Arizona Daily Wildcat, 9 read Arizona Daily Star, and 13 read at least one of these newspapers. A randomly selected student is asked whether he or she reads Arizona Daily Wildcat or Arizona Daily Star. Determine the probability that the selected student (A) reads both Arizona Daily Wildcat and Arizona Daily Star. (B) reads only Arizona Daily Wildcat.

11/30+9/30-13/30=0.23