Without Writing Down Any Calculations, Determine the Mean of the Distribution

Multiple Choice

Without writing down any calculations, determine the mean of the distribution shown. The variance of this probability distribution is (you can do this in your head!) $$\begin{array} { | l | c | c | c | } \hline \mathrm { x } & - 1 & 0 & 1 \\\hline \mathrm { P } ( \mathrm { x } ) & 0.25 & 0.50 & 0.25 \\\hline\end{array}$$

A) 0.25
B) 0.50
C) 0.75
D) 1.00