Rate of Return if State Occurs
State of	Probability of
Economy	State of Economy			Stock A			Stock B			Stock C

Boom		0.15			0.39			0.49			0.29
Good		0.55			0.15			0.20			0.08
Poor		0.25		?	0.01		?	0.09		?	0.07
Bust		0.05		?	0.20		?	0.24		?	0.10

Your portfolio is invested 24 percent each in A and C, and 52 percent in B.

a.What is the expected return of the portfolio?

b.What is the variance of this portfolio?

cWhat is the standard deviation?