A spinner with 10 equally sized slices has 2 blue slices, 4 yellow slices, and red slices. The dial is spun and stops on a slice at random. What is the probability that the dial stops on a blue slice?

Question

A spinner with 10 equally sized slices has 2 blue slices, 4 yellow slices, and  red slices. The dial is spun and stops on a slice at random. What is the probability that the dial stops on a blue slice?

oobleck · Answer

2 blue out of 10 total, so P(blue) = 2/10