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Stock A has an expected return of 1 5 % and a standard deviation of 3 5 % . If 4 0 % of a

Stock A has an expected return of

15 %

and a standard deviation of

35 % .

40 %

of a portfolio's funds are invested in stock A and the rest in the risk

-

free asset, which returns

5 %,

what is the standard deviation of the portfolio

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