Probability Review

Jessia has 7 blue marbles, 3 red marbles, and 2 yellow marbles. Jessia will randomly pick one marble from the bag.  What is the probability the marble will be red?

• 1/4
• 1/2
• 3/9
• 2/9

You roll one 6-sided die. What is the probability you will roll an even number?

• 1/6
• 1/3
• 1/2
• 3/3 = 1

You roll a 12-sided die. What is the probability of rolling a 6?

• 1/6
• 6/12 = 1/2
• 1/12
• 6/6 = 1

You roll one 6-sided die. What is the probability of rolling a 2?

• 1/6
• 2/6 = 1/3
• 1/2

Jackson flipped a coin 100 times. He got heads 67 times and tails 33 times. Which statement best describes the situation?

• 67% is the experimental probability of getting a head on a coin flip.
• 33% is the theoretical probability of getting a head on a coin flip.
• 67% is the theoretical probability of getting a head on a coin flip.
• 33% is the experimental probability of getting a head on a coin flip.

Elbert spun the spinner shown. What is the sample space of the spinner?

• {yellow, blue, red}
• {1, 2, 3, 4, 5}
• {yellow, red, blue, white, green}
• {5}

What is the sample space for a 6 sided die?

• {1, 3, 5}
• {1, 2, 3, 4, 5, 6}
• {2, 4, 6}
• {6}

Emerson tossed  a coin 100 times. It landed on heads 25 times and on tails 75 times. What is the experimental probability it will land on tails?

• 25/75 = 1/3
• 75/25 = 3
• 25/100 = 1/4
• 75/100 = 3/4

Mason is getting ready to go to a baseball game. He plans to wear either black, white, or red sneakers and a red, blue, black, or tap hat. How many possible combinations can he make?

• 3
• 4
• 7
• 12

Perry draws a card and replaces it 25 times from a standard deck of 52 cards. She records her results and gets 14 red cards and 11 black cards. What is the experimental probability of selecting a black card on her next draw?

• 11/25
• 11/52
• 14/25
• 14/52