In a mountain area where mines have to be tested for the emission of pollutants, 32% of all mines emit excessive amounts of pollutants. When tested, 98% of all mines that emit excessive amount of...

In a mountain area where mines have to be tested for the emission of pollutants, 32% of all mines emit excessive amounts of pollutants. When tested, 98% of all mines that emit excessive amount of pollutants will fail, but 21% of the mines that do not emit excessive amounts of pollutants will also fail. What is the probability that a mine that fails the test actually emits excessive amounts of pollutants?