The sample space of an experiment is S={1,2,3} . Each outcome is equally likely to occur with a probability of 13 . What is the probability of picking number 2 or 3? Write your answer in the simplest form of a fraction.(1 point)
Since each outcome is equally likely to occur with a probability of $\frac{1}{3}$, the probability of picking number 2 or 3 is the sum of the probabilities of picking 2 or 3 individually.
$P(2) + P(3) = \frac{1}{3} + \frac{1}{3} = \frac{2}{3}$
Therefore, the probability of picking number 2 or 3 is $\frac{2}{3}$.