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12. According to the American Lung Association, 90% of adult smokers started smoking before turning 21 years old. Ten smokers 21 years old or older

12. According to the American Lung Association, 90% of adult smokers started smoking before turning 21 years old. Ten smokers 21 years old or older are randomly selected, and the number of smokers who started smoking before 21 is recorded. (a) Explain why this is a binomial experiment. (b) Use TI-84 to find the probability that exactly 8 of them started smoking before 21 years of age. (c) Use calculator to find the probability that at least 8 of them started smoking before 21 years of age

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