Understanding Probability Concepts Quiz

A bag contains 4 red marbles, 3 blue marbles, and 5 green marbles. What is the probability of picking a blue marble at random?

Which of the following best describes mutually exclusive events?

• Events that can happen at the same time

• Events that cannot happen at the same time

• Events that are certain to happen

• Events that are equally likely

A fair six-sided die is rolled. What is the probability of rolling a number greater than 4?

Which of the following is the correct "or rule" for two mutually exclusive events, A and B?

A coin is tossed once. What is the probability of getting a tail?

Which of the following is NOT a probability?

A box contains 8 pens: 3 black, 2 blue, and 3 red. If one pen is picked at random, what is the probability it is not blue?