According to an almanac, 60% of adult smokers started smoking before turning 18 years old. (a) Compute the mean and standard deviation of the random variable X, the number of smokers who started smoking before 18 based on a random sample of 200 adults. (b) Interpret the mean. (a) Hx = ox =(Round to the nearest tenth as needed.) (b) What is the correct interpretation of the mean? O A. It is expected that in a random sample of 200 adult smokers, 120 will have started smoking before turning 18. O B. It is expected that in 50% of random samples of 200 adult smokers, 120 will have started smoking before turning 18. O C. It is expected that in a random sample of 200 adult smokers, 120 will have started smoking after turning 18