After a tumultuous period in the stock market, Logan Morgan is considering an investment in one of two portfolios. Given the information that follows, which investment is better, based on risk (as measured by the standard deviation) and return as measured by the expected rate of return?

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Portfolio A Portfolio B Probability .20 .50 .30 Return -2% 19% 25% Probability 10 .30 .40 .20 Return 5% 7% 12% 14%