For a coin, 2 possible result = { Head , Tail }
For a die ( 6 sided ), 6 possible result =1,2,3,4,5,6
Now when coin is tossed and a die is rolled simultaneously, (2×6)=12 possible result = sample spaces
{Head,1} , {Head,2} , {Head,3} , {Head,4} , {Head,5} , {Head,6} , {Tail,1} , {Tail,2} , {Tail,3} , {Tail,4} , {Tail,5} , {Tail,6}
n(s)=12