\(n\left(\Omega\right)=6.6=36\\ a,A=\left\{\left(1;1\right);\left(2;2\right)\left(3;3\right)\left(4;4\right)\left(5;5\right)\left(6;6\right)\right\}\\ \Rightarrow n\left(A\right)=6\\ P\left(A\right)=\dfrac{n\left(A\right)}{n\left(\Omega\right)}=\dfrac{1}{6}\)
\(b,B=\left\{\left(5;6\right),\left(6;5\right),\left(6;6\right)\right\}\\ n\left(B\right)=3\\ P\left(B\right)=\dfrac{n\left(B\right)}{n\left(\Omega\right)}=\dfrac{1}{12}\)