Disco Fever Is Randomly Found in One Half of One

Multiple Choice

Disco Fever is randomly found in one half of one percent of the general population.Testing a swatch of clothing for the presence of polyester is 99% effective in detecting the presence of this disease.The test also yields a false-positive in 4% of the cases where the disease is not present.What is the probability that the disease is not present if the test result is positive?

A) 0.8894
B) 0.9900
C) 0.9500
D) 0.9763