At a local college,147 of the male students are smokers and 343 are non-smokers. Of the female students,180 are smokers and 420 are non-smokers. A male student and a female student from the college are randomly selected for a survey. What is the probability that both are non-smokers?

Answer 1

well, we are doing two independent studies, one on males and the other on females

p male non s = 343/490
p female non s = 420/600
so
(343/490)(420/600)

Answer 2

Thank you Damon