The sample space of a 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.
Since each outcome is equally likely with a probability of 1/3, the probability of picking either number 2 or 3 would be the sum of the probabilities of picking 2 and picking 3.
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.