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# n an article about investment alternatives, Money magazine reported that drug stocks provide a potential for long-term growth, with over 52% of the

n an article about investment alternatives, Money magazine reported that drug stocks provide a potential for long-term growth, with over 52% of the adult population of the United States taking prescription drugs on a regular basis. For adults age 65 and older, 81% take prescription drugs regularly. For adults age 18 to 64, 46% take prescription drugs regularly. The age 18-64 age group accounts for 87.4% of the adult population (Statistical Abstract of the United States, 2008).

Round your answers to 4 decimal places.

**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?