Suppose you worry that your company has an outbreak of the corona virus because someone in the company in a random test program tested positive for the corona virus using a test that is only 80% reliable, i.e., false positive an false negative rates are 20% each. Also, suppose that 10% of the larger population (not the company) has the virus already. What is the probability that the employee actually has the virus?

Select one:

a.

0.8

b.

0.31

c.

0.21

d.

0.41

e.

0.2