10. In one city, 27% of adults smoke. In groups of size 140 of adults, what is the variance of the number that smoke? Round the answer to the nearest hundredth. O A. 37.80 Assume that male and female births are equally likely and that the birth of any child does not affect the probability of the gender of any other children. O B. 27.59 Find the probability of exactly eight boys in ten births. Round the answer to the nearest thousandth. O C. 5.25 OD. 13.80 O A. 0.176 O B. 0.800 A test consists of 60 multiple choice questions, each with five possible answers, only one of which is correct. Find the mean and the standard deviation of the number of correct answers. Round the answers to the nearest hundredth. O C. 0.044 O D. 0.080 O A. mean: 12.00; standard deviation: 3.46 O B. mean: 12.00; standard deviation: 3.10 O C. mean: 30.00; standard deviation: 3.10 O D. mean: 30.00; standard deviation: 5.48