Question 1099122
x===============p(x)======x*p(x)
99--------------0.002=====.198
9---------------0.02======.18
1---------------0.10------.10
0---------------0.15=======0
-1==============0.728======minus 0.728
the E(X)=0.478-0.728=-0.25 or a loss of 25 cents.