The sample space of an experiment is S={1,2,3}. Each outcome is equally likely to occur with a probability of 1 over 3. What is the probability of picking number 2 or 3? Write your answer in the simplest form of a fraction.
Since the outcomes are equally likely and there are 3 outcomes in total, the probability of picking number 2 or 3 is:
P(2 or 3) = P(2) + P(3) = 1/3 + 1/3 = 2/3
Therefore, the probability of picking number 2 or 3 is 2/3.