Challenge (Questions 21-22) 21. Using Probability Distributions (L03) Suppose the returns on Canadian stocks are normally distributed. Based on the historical record, use a cumulative normal probability table (rounded to the nearest table value) to determine the probability that in any given year you will lose money by investing in common stock. 21 Challenge (Questions 21-22) 21. Using Probability Distributions (L03) Suppose the returns on Canadian stocks are normally distributed. Based on the historical record, use a cumulative normal probability table (rounded to the nearest table value) to determine the probability that in any given year you will lose money by investing in common stock. 21