C. 56. 1) All dice have the same number: you have 6 possibilities. 2) 2 dice have the same number, but the 3rd is different: you have 6*5 3) 3.
If we throw three dice at the same time and see a sum of numbers. 6 -> (1, 3 Possible Combinations:10. 7 -> (1, 3, 3).
When rolling two dice, distinguish between them in some way: a first one and second one, a left and a right, Here is a listing of all the joint possibilities for (a, b).