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QUESTION
According to a survey, in a certain county 53% of all workers have a workplace retirement plan, 72% have health insurance, and 81% have at least one...
According to a survey, in a certain county 53% of all workers have a workplace retirement plan, 72% have health insurance, and 81% have at least one of the benefits. We select a worker at random.
What is the probability he has exactly one of health insurance or a retirement plan (not both)?
