Current Attempt in Progress Which of the following answers correctly calculates the relative risk for success in Group A compared to Group B (PA /PB ) for the two-way table below? Group A Group B Total Success 10 20 30 Failure 10 20 30 Total 20 40 60 O (10/20)/(20/40) = 1 O (10/30)/(20/40) = 2/3 O (10/60)/(20/60) = 1/2 O (20/30)/(10/30) = 2 O (20/40)/(10/30) = 3/2