Which pairs sum to 7? List them: (1,6), (2,5), (3,4), (4,3), (5,2), (6,1).
Count them: 6 favorable outcomes.
Now apply the probability formula.
##### ###### ##### ### # # ### # # ###### ## ## ## ## ## ## ## # # # # # ## ##### #### ##### # # # # # # # #### ## # ## ## ## ## # # # # # ## ## # ###### ## ### # ### # ######
##### ###### ##### ### # # ### # # ###### ## ## ## ## ## ## ## # # # # # ## ##### #### ##### # # # # # # # #### ## # ## ## ## ## # # # # # ## ## # ###### ## ### # ### # ######
(Sum equals 7)
Which pairs sum to 7? List them: (1,6), (2,5), (3,4), (4,3), (5,2), (6,1).
Count them: 6 favorable outcomes.
Now apply the probability formula.