A study was done to ascertain the effectiveness of a flu vaccine . Two groups of people ( vaccinated and not vaccinated ) were followed during flu season to see how many in each group ended up catching the flu. The results are summarized in the table below :

	Vaccinated	Not Vaccinated
Got Flu	100	200
Did Not Get Flu	300	200

A. What is the probability that if a person in this study is randomly selected , that person did not get the flu ?

B. What is the probability that if a person in this study is randomly selected , that person got thefluand was vaccinated ?

C. What is the probability that if a person in this study is randomly selected , that person got the flu or was vaccinated ?

D. What is the probability that if a person in this study is randomly selected , that person got the flu given that he/she was vaccinated ?

What is the probability that if a person in this study is randomly selected , that person was in the not vaccinated group given he/she got the flu ? ( Round to two decimal places)