3 standard deviations () of the mean ().] 75%95%50%5%

A bank has an investment portfolio worth $300 million. Its quarterly average return is estimated at 4.3% with a standard deviation of 5.5%. What is the approx. chance that the portfolio will lose $20 million or more during the next quarter? [Note: 68% of the data is within 1 standard deviation (o) of the mean (g), 95% of the data is within 2 standard deviations (o) of the mean (g), and 99.7% of the data is within 3 standard deviations (o) of the mean O O O 75% 95% 5%