Ch $08$: End$-$of$-$Chapter Problems$-$LPK $-$ Risk and Rates of Return

Stocks A and $B$ have the following probability distributions of expected future returns:

a$.$ Calculate the expected rate of return,

$,$ for Stock B $($

$\%$

b$.$ Calculate the standard deviation of expected returns, ${}_A,$ for Stock $A({}_B=19\mathrm{.}64\%.)$ Do not round intermediate calculations. Round your answer

to two decimal places.