A single die is rolled twice. The 36 equally-likely outcomes are shown to the right.
Find the probability of getting two numbers whose sum is 3.
To find the probability of getting two numbers whose sum is 3, we need to count the number of outcomes that satisfy this condition and divide by the total number of possible outcomes.
The only outcomes that satisfy the condition of getting two numbers whose sum is 3 are (1,2) and (2,1).
Therefore, there are 2 outcomes that satisfy the condition.
Since there are 36 equally-likely outcomes in total, the probability of getting two numbers whose sum is 3 is 2/36, which simplifies to 1/18.