The sample space of a toss of two dice is:
[tex] \end{bmatrix} (1,1) (1,2) (1,3) (1,4) (1,5) (1,6) \\
(2,1) (2,2) (2,3) (2,4) (2,5) (2,6) \\
(3,1) (3,2) (3,3) (3,4) (3,5) (3,6) \\
(4,1) (4,2) (4,3) (4,4) (4,5) (4,6) \\
(5,1) (5,2) (5,3) (5,4) (5,5) (5,6) \\
(6,1) (6,2) (6,3) (6,4) (6,5) (6,6)
\end{bmatrix} [/tex]
The sample space denoting the sum of 7 or 11 is:
[tex] \begin{bmatrix}
(1,6) (6,1) (3,4) (4,3) (5,2) (2,5) (5,6) (6,5)
\end{bmatrix} [/tex]