Question

The reliability of a Covid-19 test is specified as follows:

Of people having Covid-19 , 90% of the test detect the disease but 10% go undetected. Of people free

of Covid-19 , 99% of the test are judged Covid-19 negative but 1% are diagnosed as showing Covid-19

positive .

From a large population of which only 0.1% have Covid-19 , one person is selected at random, given

the Covid-19 test and Pathologist reports him/her as Covid-19 positive.

Based on the above information , answer the following questions:

(i) What is the probability of the person to be tested as Covid-19 positive given that he is actually

having Covid-19 ?

(a) 0.001 (b) 0.1 (c)0.8 (d) 0.9​

Answer 1

Answer:

I think Ist part ans is 0.1