Finite Mathematics Quiz
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COUNTING AND DISCRETE STRUCTURES
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A company has 150 employees. Each employee is offered optional insurance plans for health (H), dental (D), and vision (V). It is known that 90 employees have health insurance, 70 have dental, and 60 have vision. Additionally, 40 have health and dental, 35 have health and vision, and 20 have all three. A total of 10 employees have none of the three insurance plans.
How many employees have both dental and vision insurance?
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