Given the person does not have COVID, the probability the test is positive (false positive) is 1% = 1001.
It is given that only 0.1% of a large population have COVID infection. In this population, the reliability of COVID RTPCR-test is specified as follows :
For persons having COVID, 90% of the test detects the disease but 10% goes undetected. For persons not having COVID, 99% of the test is judged COVID negative but 1% are diagnosed as COVID positive.
Based on the above informations, answer the question :
The probability of the person to be tested as COVID positive, given that he is actually not having COVID is :
Held on 17 Aug 2022 · Verified 13 Jul 2026.
1001
109
101
10099
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