1)the sample spaces are when Sum is 6={(1,5),(2,4),(3,3),(4,2),(5,1)}
but we want the case when 1st die is 4 i.e. (4,2)
So, probability 1/5
2)1st die is 4 in the cases {(4,1),(4,2),(4,3),(4,4),(4,5),(4,6)}
But we want 2nd die to be 2 i.e.(4,2)
So, probability = 1/6