7th Grade: Unit 6 - Probability Review

When rolling a 6-sided number cube, what is the likelihood that an odd number will be rolled?

• Certain

• Likely

• Neither likely nor unlikely

• Unlikely

When drawing a marble at random out of the bag, what is the likelihood of drawing a white marble?

• Certain

• Likely

• Neither likely nor unlikely

• Unlikely

The probability of spinning an even number on this spinner is 0.6. Which word describes the likelihood of this event?

• Certain

• Likely

• Neither likely nor unlikely

• Unlikely

Calculate the probability of spinning a 4.

• 0.4

• 0.2

• 0.5

• 0.1

What is the probability of rolling a 1 or a 2 on a 6-sided number cube?

• 1/6

• 1/2

• 1/4

• 1/3

Shown is a Punnett square combining genetics for eye color: Bb (brown eyes with recessive gene for blue eyes) and bb (blue eyes).

What's the probability that the off spring of these two eye genes will be blue eyes (bb)?

• 1/4

• 1/2

• 3/4

• 1

Mia decided to experiment with probability by rolling a 6-sided number cube. She knows that theoretical probability states that if you roll the cube six times, each number should appear once.

Mia rolled the cube six times and got the following results.

Because Mia did not roll a 3 or a 4 at all, she has decided that theoretical probability is not true. Is Mia's decision justified?

• No, Mia's decision is not justified. If she rolled the number cube more times, she would find that the more she rolled, the closer her experimental probability would get to the theoretical probability.

• No, Mia's decision is not justified. She should know that theoretical probability is a mathematical concept and should not argue with it.

• Yes, Mia's decision is justified. Her experiment proved that the theory was wrong.

• Yes, Mia's decision is justified. It is common knowledge that you will never produce one of each number if you roll six times.

If the spinner is spun 300 times during an experiment, how many times could you expect it to land on "Blue"?

• Exactly 200 times

• Approximately 200 times

• Exactly 100 times

• Approximately 100 times

Josh conducted an experiment with the bag of marbles. He will draw a marble out of the bag, record the result, return the marble to the bag, and draw another marble, continuing the process.

If he completes this process 600 times, about how many times should he expect to draw a striped marble?

• Approximately 400 times

• Approximately 250 times

• Approximately 200 times

• Approximately 150 times

Ruby flipped the coin and spun the spinner. What is the probability that the coin will land on heads AND the spinner will land on either a 2 or a 3?

• 1/2

• 1/4

• 1/10

• 1/3