Question

Introduction to the probability of an eventA bag with 12 marbles has 5 blue marbles, 3 red marbles, and 4 yellowmarbles. A marble is chosen from the bag at random. What is theprobability that it is blue or red?Write your answer as a fraction in simple form

Answer 1

12 marbles in total

- 5 blue

- 3 red

- 4 yellow

probability that it is blue or red: P(blue) + P(red)

`\begin{gathered} (5+3)/(12) \\ =(8)/(12) \\ =(2)/(3) \end{gathered}`

2/3 = 66.67%