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# A study is conducted to assess the impact of caffeine consumption, smoking, alcohol consumption, and physical activity on cardiovascular disease.

A study is conducted to assess the impact of caffeine consumption, smoking, alcohol consumption, and physical activity on cardiovascular disease. Suppose that 40% of participants consume caffeine and smoke. If 8 participants are evaluated, what is the probability that:Exactly half of them consume caffeine and smoke? More than 6 consume caffeine and smoke? Exactly 4 do not consume caffeine or smoke?