Problem 6. Use the data in the accompanying table. (based on data from “Helmet Use and Risk of Head Injuries in Alpine Skiers and Snowboar ders") Head Injuries Not Injured Wore Helmet 96 656 No Helmet 480 2330 a. Helmets and Injuries If one of the subjects is randomly selected, find the probability of selecting someone with a head injury. b. Helmets and Injuries If one of the subjects is randomly selected, find the probability of selecting someone who wore a helmet. c. Helmets and Injuries If one of the subjects is randomly selected, find the probability of selecting someone who had a head injury or wore a helmet. d. Helmets and Injuries If one of the subjects is randomly selected, find the probability of selecting someone who did not wear a helmet and was not injured. e. Helmets and Injuries If two different study subjects are randomly selected, find the probability that they both wore helmets, without replacement t. Helmets and Injuries If two different study subjects are randomly selected, find the probability that they both had head injuries, without replacement g. Helmets and Injuries If one of the subjects is randomly selected, find the probability of selecting someone who did not wear a helmet, given that the subject had head injuries. h. Helmets and Injuries If one of the subjects is randomly selected, find the probability of selecting someone who had head injuries, given that the subject wore helmet.

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