A Men's Clothing Store Has Determined the Following Probability Distribution $\begin{array}{cc}\text { Number Ordered } & \text { Probability } \\0 & .10 \\5 & .10 \\10 & .12 \\15 & .30 \\20 & .38\end{array}$

Multiple Choice

A men's clothing store has determined the following probability distribution for
The number of special size orders placed per month. Based on this distribution, the
Standard deviation in the number of special size orders placed per month is $\begin{array}{cc}\text { Number Ordered } & \text { Probability } \\0 & .10 \\5 & .10 \\10 & .12 \\15 & .30 \\20 & .38\end{array}$

A) 43.56
B) 6.6
C) 15.345
D) 4.9
E) 3.88