A Firm Is Considering Two Projects,A and B,with the Following

Multiple Choice

A firm is considering two projects,A and B,with the following probability distributions for profit. $$\begin{array} { c c c } \begin{array} { c } \text { Prafit } \\\text { (\$1,000s) }\end{array} & \begin{array} { c } \text { Praject } A \\\text { Prabability } ( \% ) \end{array} & \begin{array} { c } \text { Project } B \\\text { Prabability } ( \% ) \end{array} \\\hline \$ 20 & 10 & 10 \\40 & 15 & 15 \\60 & 50 & 25 \\80 & 15 & 40 \\100 & 10 & 10\end{array}$$ Given the above,what is the variance of project B?

A) 10
B) 21
C) 165
D) 440
E) 515