Final answer:
The probability of getting a sum of 3 when rolling two standard six-sided dice is 1/18.
Step-by-step explanation:
To find the probability of getting a sum of 3 when rolling two standard six-sided dice, we need to determine the number of favorable outcomes and divide it by the total number of possible outcomes.
There are 2 favorable outcomes: (1, 2) and (2, 1).
There are 36 total possible outcomes when rolling two dice, as each die has 6 sides.
Therefore, the probability of getting a sum of 3 is 2/36, which simplifies to 1/18.