Exhaustive no. of cases = 63 10 can appear on three dice either as distinct number as following (1, 3, 6) ; (1, 4, 5); (2, 3, 5) and each can occur in 3! ways. Or 10 can appear on three dice as repeated digits as following (2, 2, 6),(2, 4, 4), (3, 3, 4) and each can occur in