Introduction to Probability Review

What is the probability of choosing a yellow marble from the marbles shown?

• 2/7
• 1/2
• 3/4
• 1/7

What is the probability of choosing a blue marble from the marbles shown?

• 2/7
• 1/2
• 3/4
• 1/7

What is the probability of getting a green marble? 

• 2/5
• 1/2
• 3/4
• 1/5

What is the probability of choosing a gray sock from a drawer filled with 8 black socks and 12 gray socks?

• 2/5
• 1/2
• 3/4
• 3/5

These cards are used to play a game between two people.  If you draw a card at random, what is the probability that you will draw a star?

• 5/6
• 2/5
• 2/3
• 1/10

If you draw two cards, what is the probability that you will draw a square and then a star?

• 1/10
• 1/5
• 2/25
• 1/25

You roll a cube numbered one through six.  What is the probability of landing on a number less than 6?

• 1/2
• 5/6
• 5/12
• 2/3

The six faces of a fair cube are numbered 1 through 6.  If the cube is rolled 450 times, what is the expected number of times a number greater than 4 will land face-up?

• 75
• 125
• 150
• 200

McKenzie chooses one coin at a time from her coin jar and replaces it.  She repeats this and records the results in the table below. 
Based on the table, which coin has an experimental probability of  for being chosen?

• $0.01
• $0.05
• $0.10
• $0.25

Regardless of how many times you land on heads when you flip a coin over and over, what is the probability that the coin will land on heads on the next toss?

• 1/6
• 1/3
• 1/2
• 1