$\begin{array}{ccc}\multicolumn{1}{c}{P(E\cap R)}& =\hfill & P(R|E)\xb7P(E)=0.66\xb70.09=0.0594=5.94\%\hfill \\ \multicolumn{1}{c}{P(\stackrel{\u203e}{E}\cap \stackrel{\u203e}{R})}& =\hfill & P(\stackrel{\u203e}{R}|\stackrel{\u203e}{E})\xb7P(\stackrel{\u203e}{E})=0.65\xb70.91=0.5915=59.15\%.\hfill \end{array}$ |
$R$ | $\stackrel{\u203e}{R}$ | sum | |
$E$ | 5.94 | 3.06 | 9.00 |
$\stackrel{\u203e}{E}$ | 31.85 | 59.15 | 91.00 |
sum | 37.79 | 62.21 | 100.00 |