The table below is the probability table for a random variable X. Find Var(X). $$\begin{array} { l | l l l l }
\text { Outcome } & - 1 & 0 & 1 & 2 \
\hline \text { Probability } & \frac { 3 } { 7 } & \frac { 1 } { 7 } & \frac { 1 } { 7 } & \frac { 2 } { 7 }
\end{array}$$ Enter just a reduced fraction of form $\frac { a } { b }$ .

Question

The table below is the probability table for a random variable X. Find Var(X). $$\begin{array} { l | l l l l } 
\text { Outcome } & - 1 & 0 & 1 & 2 \
\hline \text { Probability } & \frac { 3 } { 7 } & \frac { 1 } { 7 } & \frac { 1 } { 7 } & \frac { 2 } { 7 }
\end{array}$$ Enter just a reduced fraction of form $\frac { a } { b }$ .

Quizplus · Accepted Answer

The Answer is

\frac { 80 } { 49 }

The Table Below Is the Probability Table for a Random