Explain Why the Following Is or Is Not a Valid $$\begin{array} { | c | c | c | c | c | c | } \hline x & 10 & 20 & 30 & 40 & 50 \\\hline p ( x ) & .3 & .2 & .2 & .2 & .2 \\\hline\end{array}$$

Essay

Explain why the following is or is not a valid probability distribution for the discrete
random variable x. $$\begin{array} { | c | c | c | c | c | c | } \hline x & 10 & 20 & 30 & 40 & 50 \\\hline p ( x ) & .3 & .2 & .2 & .2 & .2 \\\hline\end{array}$$