Refer to the Following:
a Firm Is Considering Two Projects

Multiple Choice

Refer to the following:
A firm is considering two projects, A and B, with the following probability distributions for profit.
$$\begin{array} { c c c } \begin{array} { c } \text { Profit } \\\text { (\$1,000s) }\end{array} & \begin{array} { c } \text { Praject } A \\\text { Probability } ( \% ) \end{array} & \begin{array} { c } \text { Project B} \\\text { Prabability (\%) }\end{array} \\\hline \$ 20 & 10 & 10 \\40 & 15 & 15 \\{ 5 0 } & 50 & { 2 5 } \\{ 8 0 } & 15 & 40 \\100 & 10 & 10\end{array}$$
-What is the variance of project B?

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