In 1970, 11% of americans completed four years of college; 43% of them were women. in 1990, 22% of americans completed four years of college; 53% of them were women (time, jan. 19, 1996). (a) given that a person completed four years 2 of college in 1970, what is the probability that the person was a woman? (b) what is the probability that a woman finished four years of college in 1990? (c) what is the probability that a man had not finished college in 1990?