Question: In an article about investment alternatives. Money magazine reported that drug stocks pro-vide a potential for long-term growth. with over 50% of the adult population of the United States taking prescription drugs on a regular basis. For adults age 65 and older. 82% take prescription drugs regularly. For adults age 18 to 64.49% take prescription drugs regularly. The age 18-64 age group accounts for 83.5% of the adult population (Statistical Abstract of the United States. 2008).
a. What is the probability that a randomly selected adult is 65 or older?
b. Given an adult takes prescription drugs regularly. what is the probability that the adult is 65 or older?