Question 1076213
The probability of getting two threes is (1/6)(1/6)(5/6)*2+(5/6)(5/6(5/6)=135/216
The probability of three threes is (1/6)(1/6)(1/6)=1/216
The total probability is 136/216=17/27
The same would go for any of the six numbers.
The probability of getting any two numbers the same on any given roll is 1*(1/6)(5/6)=5/36, since the first number can be anything but then restricts the next two.