Hunter says she is itchy. There is a test for Allergy to Cats, but this test is not always right: For people that really do have the allergy, the test says "Yes" 80% of the time. For people that do not have the allergy, the test says "Yes" 10% of the time ("false positive"). If 1% of the population has the allergy, and Hunter's test says "Yes", what are the chances that Hunter really has the allergy? * 1.07% 7.48% 14.8% O 10.7%
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