A bag contains 4 balls. Each ball is a single color, and 3 distinct colors are represented in the bag. What is the probability that the first 2 balls selected without replacement are the same color? Express your answer as a common fraction.
The question here says there are 3 different colors and 1 of them has 2 balls. To select two same color balls we need to pick that particular ball. The chance is: [tex] \frac{2}{4} \times \frac{1}{3} = \frac{1}{6} [/tex]