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+//Example 12.2
+//Find the probability of the problem.
+disp('The sample space in this case is:-');
+disp('(1,1) (1,2) (1,3) (1,4) (1,5) (1,6)');
+disp('(2,1) (2,2) (3,3) (4,4) (5,5) (6,6)');
+disp('(3,1) (2,2) (3,3) (4,4) (5,5) (6,6)');
+disp('(4,1) (2,2) (3,3) (4,4) (5,5) (6,6)');
+disp('(5,1) (2,2) (3,3) (4,4) (5,5) (6,6)');
+disp('(6,1) (2,2) (3,3) (4,4) (5,5) (6,6)');
+disp('Implies that N=36');
+disp('Let A be the event of sum 7' );
+disp('A={1,6} (2,5) (3,4) (4,3) (5,2) (6,1)} i.e n(A)=6' );
+p_a=6/36;
+disp(p_a,'Hence the probability of getting a sum 7 is p(A)=6/36=' );
+disp('Let B be the event of sum 11' );
+disp('A={5,6} (6,5) } i.e n(B)=2' );
+p_b=2/36;
+disp(p_b,'Hence the probability of getting a sum 2 is P(B)=2/36=' );
+disp('Let C be the event of sum 7 or 11' );
+disp('Probabilty of getting a sum of 7 or 11 ,P(C)=P(A)+P(B)' );
+p_c=p_a+p_b;
+disp(p_c,'Hence the probability of getting a sum 7 or 11 is P(C)=' );
+disp('Let D be the event of sum 3' );
+disp('A={1,2} (2,1)} i.e n(A)=2' );
+p_d=2/36;
+disp(p_d,'Hence the probability of getting a sum 3 is P(D)=2/36=' );
+disp('Let E be the event of sum 2 or 12' );
+disp('Probabilty of getting a sum of 2 or 12 ,P(E)=P(sum of 2)+P(sum of 12)' );
+disp('P(sum of 2)=1/36  P(sum of 12)=1/36')
+p_e=2/36;
+disp(p_e,'Hence the probability of getting a sum of 2 or 12 is P(E)=' );
+disp('Let F be the event of sum 2 or 3 0r 12' );
+disp('Probabilty of getting a sum of 2 or 3 or 12 ,P(F)=P(D)+P(E)' );
+p_f=p_d+p_e;
+disp(p_f,'Hence the probability of getting a sum 2 or 3 or 12 is P(F)=' );