The Red Sox are commissioning a study to help them understand how traffic to home games at Fenway Park will be impacted by the BU Bridge construction project will impact the way fans arrive to games. After speaking with 925 fans, they found that 400 of them never drive to games. 100 of the fans said, "I never drive, and I never take the T." 150 fans said, "Sometimes I take the T, and sometimes I drive...it just depends on how I feel that day."

Given that a Red Sox fan never takes the T to the games, what is the chance that he never drives to the games? _________ Given that a Red Sox fan sometimes drives to games, what is the chance that he never takes the T to games?