Total number of outcomes is
6×6=6 Favourable outcomes is (1, 5), (1, 6), (2, 4), (2, 5), (2, 6), (3, 3),(3, 4), (3, 5), (3, 6), (4, 2), (4, 3), (4, 4), (4, 5), (4, 6), (5, 1),(5, 2), (5, 3), (5, 4), (5, 5), (5, 6), (6, 1), (6, 2), (6, 3), (6, 4),(6, 5), (6, 6), that is 26.
Therefore, required probability is
P==