Question 1121414
x=0 p(x)=0.05
x=50000 p(x)=0.20
x=20000 p(x)=0.75

E(x)=0+$10000+$15000=$25000
V(x)=in thousands (25^2*0+25^2*0.20+5^2*0.75=125+18.75=143.75 thousands dollars^2
SD=sqrt (V)=$11.99 thousands or $11,990