Question: (Expected return and risk) The following data represent returns for the common stocks over a one- year period. Probability Returns Google ATT 0.1 -20% -10%

(Expected return and risk) The following data represent returns for the common stocks over a one- year period. Probability Returns Google ATT 0.1 -20% -10% 0.2 8% 4% 0.2 15% 9% 0.3 -18% 20% 0.2 4% -6% The standard deviation of Google return is %. (Keep the sign and two decimal numbers.)
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