If the dice are fair then it is 5/36.
It is 1/9.
If the order of the dice is irrelevant, then the answer is 21. If the order of the dice is relevant, the answer is 36.
The expected value is 7.
The probability to get a 12, with two dice, is 1/36.
There is one way to roll a sum of 12. There are 36 different outcomes from rolling a pair of dice. Therefore, the probability is 1/36 ~= 0.0278 = 2.78%
One die and a pair of dice
Simply dice, dice is the plural of die. One die and a pair of dice.
When rolling one die, the probability of getting a 4 is 1 in 6, or 0.1667. If two dice are rolled, you get two unrelated chances of rolling at least one 4, so the probability is 2 in 6, or 0.3333.
Paradise (pair of dice).
Prob = 4/36 = 1/9