10. The following data from a sample of 100 families show the record of college attendance by fathers and their oldest sons: in 22 families, both father and son attended college; in 31 families, neither father nor son attended college; in 12 families, the father attended college while the son did not; and, in 35 families, the son attended college while the father did not.
a. What is the probability a son attended college given that his father attended college? 0.22 (3 pts)
b. What is the probability a son attended college given that his father did not attend college? 0.35 (3 pts)
My answers are wrong and I followed the joint probability formula..