The sample space of an experiment is S={1, 2, 3}. Each outcome is equally likely to occur with a probability of 1/3. What is the probability of picking number 2 or 3? Write your answer in the simplest form of a fraction.
The probability of picking number 2 or 3 is the sum of the individual probabilities of picking each number, since they are mutually exclusive events.
P(2 or 3) = P(2) + P(3) = 1/3 + 1/3 = 2/3
So, the probability of picking number 2 or 3 is 2/3.