posted by Ben .
A survey of 815 students is asked whether or not they have cable TV and Internet cable in their rooms at home.
Results of the survey showed that 69% of students has cable TV, 58% of students has Internet cable and 37% of students has both cable TV and Internet cable.
Suppose, one student is chosen randomly. Given that the student has Internet cable, what is the probability that he or she does not have cable TV ?