Probability

Topics in this chapter

• Probability Fundamentals
• Complementary and Conditional Events
• Coins, Dice, and Cards
• Number-Based Probability
• Algebraic Probability
• Calendar and Word Problems

Cheat sheet

Practice questions

1. Question 1Q-4A1680

   Which of the following cannot be the probability of an event?

   1. A.2/3
   2. B.-1.5
   3. C.15%
   4. D.0.7
   See the answer and solution
2. Question 2Q-EF7993

   If a card is drawn from a well-shuffled deck of 52 playing cards, what is the probability of getting a red face card?

   1. A.3/26
   2. B.3/13
   3. C.1/2
   4. D.1/26
   See the answer and solution
3. Question 3Q-F5C42A

   A box contains 3 blue, 2 white, and 4 red marbles. If a marble is drawn at random from the box, what is the probability that it is not white?

   1. A.2/9
   2. B.4/9
   3. C.7/9
   4. D.5/9
   See the answer and solution
4. Question 4Q-796362

   Two dice are thrown simultaneously. What is the probability that the sum of the two numbers appearing on the top is 8?

   1. A.5/36
   2. B.1/6
   3. C.7/36
   4. D.1/9
   See the answer and solution
5. Question 5Q-749DFF

   A game of chance consists of spinning an arrow which comes to rest pointing at one of the numbers 1, 2, 3, 4, 5, 6, 7, 8, and these are equally likely outcomes. What is the probability that it will point at a number greater than 4?

   1. A.1/2
   2. B.1/4
   3. C.3/8
   4. D.5/8
   See the answer and solution