Head injuries l Not InjuredWore Helmet 5 l 4No Helmet 8 l 1What is the probability that a skier wore

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Head injuries l Not InjuredWore Helmet 5 l 4No Helmet 8 l 1What is the probability that a skier wore a helmet and was injured?What is the probability that a skier wore a helmet or was not injured?Given that a skier wore a helmet, what is the probability that the skier was injured?