Probability

Can someone please help me? certain medical diagnostic test is used to determine if people have pinkyitis and it is known that 1 in 1300 Americans has the disease. The test correctly diagnoses the presence of pinkyitis 97% of the time and it correctly diagnoses the absence of the disease 98% of the time. Find the probability that a person has the disease given that the test says that he has the disease. Find the probability that a person does not have the disease given that the test says that he does not have the disease

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