Probability Quiz

What is the expected value of rolling a fair six-sided die?

• 6.5

• 4.5

• 2.5

• 3.5

A bag contains 5 red marbles, 3 blue marbles, and 2 green marbles. If one marble is drawn at random, what is the expected value of the color of the marble?

• Red

• Blue

• Green

• 1.7

A fair coin is flipped 3 times. What is the expected number of heads?

• 2.0

• 1.5

• 0.5

• 3.0

A spinner is divided into 8 equal sections numbered from 1 to 8. If the spinner is spun once, what is the expected value of the number landed on?

• 3.2

• 6.5

• 2.5

• 4.5

A deck of cards contains 52 cards. If one card is drawn at random, what is the expected value of the suit of the card?

• 0.5

• 1

• 0.25

• 13

A fair six-sided die is rolled twice. What is the expected sum of the two rolls?

• 5

• 2

• 7

• 10

A bag contains 4 red marbles and 6 blue marbles. If two marbles are drawn at random without replacement, what is the expected value of the color of the second marble?

• 2/5

• 1/2

• 3/5

• 4/10

A fair coin is flipped 5 times. What is the expected number of tails?

• 3

• 2.5

• 1

• 4

A spinner is divided into 6 equal sections numbered from 1 to 6. If the spinner is spun twice, what is the expected value of the sum of the two numbers landed on?

• 3

• 10

• 12

• 7

A deck of cards contains 52 cards. If two cards are drawn at random without replacement, what is the expected value of the suit of the second card?

• 1/5

• 1/3

• 1/4

• 1/2