الف)
$p(A) = \frac{{n(A)}}{{n(S)}} = \frac {\begin{pmatrix} {6} \\ {2} \\ \end{pmatrix} \times \begin{pmatrix} {4} \\ {1} \\ \end{pmatrix}}{\begin{pmatrix} {10} \\ {3} \\ \end{pmatrix}} = \frac{{15 \times 4}}{{120}} = \frac{1}{2}$
ب)
$P(B) = \frac{{n(B)}}{{n(S)}} = \frac {\begin{pmatrix} {4} \\ {2} \\ \end{pmatrix} \times \begin{pmatrix} {6} \\ {1} \\ \end{pmatrix}+\begin{pmatrix} {4} \\ {3} \\ \end{pmatrix}}{\begin{pmatrix} {10} \\ {3} \\ \end{pmatrix}} = \frac{{6 \times 6 + 4}}{{120}} = \frac{{40}}{{120}} = \frac{1}{3}$