If one of the subjects is randomly selected, find the probability of selecting someone who had a head injury or wore a helmet.

use the data in the accompanying table (based on data from “Helmet Use and Risk of Head Injuries in Alpine Skiers and Snowboarders” by Sullheim et al., Journal of the American Medical Association, Vol. 295, No. 8).

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Wore helmet No helmet Head injured Head not injured 96 656 480 2330