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7 July, 22:47

Nathan had an infection, and his doctors wanted him to take penicillin. Because nathans father and paternal grandfather were allergic to penicillin, nathan has a 75% chance of having the same allergy. the doctor performed a skin test to see whether nathan would react to it. The test is 98% accurate. If the test predicts that nathan is not allergic to penicillin, what is the probability after the test that nathan is not allergic to the drug

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  1. 7 July, 23:01
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    It would be. 25/1.00 = 25% bc since Nathan thinks he is 75% allergic and the question is asking the probability he isn’t all u have to do is 100-75
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