the centers for disease control and prevention receives information about the causes for hiv/aids infection in the united states. displayed are the causes of infection and their respective probability among american women age 20 to 24 years. cause probability injection drug use ? heterosexual sex 0.664 perinatal infection 0.125 other causes 0.095 this is a legitimate probability model. therefore, what must be the probability that an american woman age 20 to 24 was infected via injection drug use? 0.206