The joint distribution of $X$ and $y$ is given in the following table: \begin{tabular}{1[CICICC} & & & $Y$ & \hline & & 10 & 20 & 30 \hline$X$ & 0 & $0.2$ & $0.1$ & $0.3$ Thline & 1 & $0.15$ & & $0.2$ & $0.95$ \hline & & & & \end{tabular) $$ P(X=3)=? $$ SP.VS.8021