Question 1159689
b=0.10 needed to make the probability sum 1.0
E(X)=-0.24+0+0.48+.25=0.49 or $490.000
SD is the difference from the mean squared *probability, add them up and take square root
1.49^2*0.24+0.49^2*0.18+0.51^2*0.48+2.01^2*0.1
=1.1049
sqrt of that is 1.051 or $1,051,000