A Market Research Team Compiled the Following Discrete Probability Distribution

Multiple Choice

A market research team compiled the following discrete probability distribution on the number of sodas the average adult drinks each day.In this distribution, x represents the number of sodas which an adult drinks. $$\begin{array} { | l | l | } \hline \boldsymbol { x } & \mathrm { P } ( \mathrm { x } ) \\\hline 0 & 0.30 \\\hline 1 & 0.10 \\\hline 2 & 0.50 \\\hline 3 & 0.10 \\\hline\end{array}$$ The standard deviation of x is _______________.

A) 1.04
B) 0.89
C) 1.40
D) 1.02
E) .588