Allergic reactions to poison ivy can be miserable. Plant ps) oils cause the reac
ID: 3057020 • Letter: A
Question
Allergic reactions to poison ivy can be miserable. Plant ps) oils cause the reaction. Researchers at Allergy Institute did a study to determine the effects of washing the oil off within 5 minutes of exposure. A random sample of 1000 people with known allergies to poison ivy participated in the study. Oil from the poison ivy plant was rubbed on a patch of skin. For 500 of the subjects, it was washed off within 5 minutes. For the other 500 subjects, the oil was washed off after 5 minutes. The results are summarized in the table Re ction Within S After 5 minutes What is the probability that a person selected at random had a strong reaction given washed oil within 5 minutes? Express answer as a decimal rounded to the nearest hundredth P(strong, given washed within 5 minutes) )Allergic reactions to poison ivy can be miserable. Plant oils cause the reaction. Researchers at Allergy Institute did a study to determine the effects of washing the oil off within 5 minutes of exposure. A random sample of 1000 people with known allergies to poison ivy participated in the study. Oil from the poison ivy plant was rubbed on a patch of skin. For 500 of the subjects, it was washed of within 5 minutes. For the other 500 subjects, the oil was washed off after 5 minutes. The results are summarized in the table Within 5 After 5 minutes What is the probability that a person selected at random washed off the oil within 5 minutes? Express answer as a decimal rounded to the nearest hundredth Pwashed within 5 minutes) ipts extra creditExplanation / Answer
5)
P(strong| washed within 5 minutes) =20/ 500 =0.04
6)
P(washed within 5 minutes ) =500/1000 =0.5
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