Answer: 1/3
Step-by-step explanation:
The set of outcomes we want to happen is {1,2}. These items are less than 3. We have A = 2 outcomes here.
There are B = 6 total outcomes in the set {1,2,3,4,5,6} which are values on a standard cube.
The probability we want is A/B = 2/6 = 1/3