Investment A has an expected return of 7.8% with a standard deviation of 2%. Investment B has an expected return of 7.2% with a standard deviation of 3.1%. Which stock is more likely to have a return greater than 10%? Select one: O a. Stock B O b. Stock A O c. The probability is the same for both A and B. O d. Unable to determine. A bank's loan officer rates applicants for credit. The ratings are normally distributed with a mean of 200 and a standard deviation of 50. If an applicant is randomly selected, find the probability of a rating that is between 170 and 220. Select one: O a. 0.1554 O b. 0.0703 O c. 0.2257 O d. 0.3811A bank's loan officer rates applicants for credit. The ratings are normally distributed with a mean of 200 and a standard deviation of 50. If an applicant is randomly selected, find the probability of a rating that is between 200 and 275. Select one: O a. 0.5 O b. 0.0668 O c. 0.9332 O d. 0.4332 The lengths of human pregnancies are normally distributed with a mean of 268 days and a standard deviation of 15 days. What is the probability that a pregnancy lasts at least 300 days? Select one: a. 0.0179 b. 0.9834 O C. 0.0166 O d. 0.4834