1. The document is a review worksheet for Chapter 11 that contains 20 probability questions. 2. The questions cover topics like tossing coins, spinning spinners, experimental vs theoretical probabilities, tree diagrams, and predicting outcomes of random events. 3. The student provided responses to each question, showing the work and calculations for some of the probability problems.

1. Name __________________________________ Date ______________________
Mrs. Labuski & Mrs. Rooney Period _______ Ch 11 Review
Write impossible, unlikely, likely, as likely as not, or certain to describe each
event.
1. You toss a coin and it comes up tails. ________________
2. You spin a 6 on the spinner shown. ________________
3. The weather report indicates that there is a 60% chance of rain for Saturday.
Write this probability as a decimal and fraction.
4. For the experiment, identify the outcome shown and the sample space.
__________________________________
__________________________________
5. A bottle cap is tossed 20 times and the results are
recorded in the table above. What is the probability
that the bottle cap will land up?
6. Find the experimental probability of the bottle cap landing down. ____________
7. Find the experimental probability of the bottle cap landing up or down ________

2. 8. Cass recorded the number of times a spinner landed
on each letter. Based on Cass’ experiment, on which
letter is the spinner most likely to land?
9. On which letter is the spinner least likely to land?
10. What is the probability of this spinner landing on A?
11. What is the probability of rolling a number greater than 6 on a
fair number cube?
12. Raymond has a 95% chance of winning a prize in the spelling contest. What is
the probability that he will not win a prize in the spelling contest?
13. Jessica is preparing lunch for school. She has a choice of chicken or roast beef,
one fruit choice (banana or orange), and one cookie (chocolate chip or oatmeal).
How many different lunches could she make? Draw a tree diagram
14. If Jessica chooses at random, find the probability of selecting chicken, a banana,
and an oatmeal cookie.

3. 15. You go to the local restaurant for lunch. You have 3 choices of pasta, 3 choices
for sauce, and either soup or salad. How many different choices are there for lunch?
Draw a tree diagram.
16. The number cube is rolled and the spinner is spun. What is the probability that
you will roll a 7 and spin white?
17. What is the probability that you will roll 2 and spin yellow?
18. What is the probability that you will roll an even number, and spin purple?
19. About 5% of the items produced by a company are defective. Out of 1,000
items, how many would you predict will be defective?
20. If you roll a fair 6-sided number cube 100 times, how many times would you
expect to roll an odd number?

4. Name __________________________________ Date ______________________
Mrs. Labuski & Mrs. Portsmore Period _______ Ch 11 Review
Write impossible, unlikely, likely, as likely as not, or certain to describe each
event.
1. You toss a coin and it comes up tails. as likely as not
2. You spin a 6 on the spinner shown. impossible
3. The weather report indicates that there is a 60% chance of rain for Saturday.
Write this probability as a decimal and fraction.
0.60 and
4. For the experiment, identify the outcome shown and the sample space.
Outcome: 4
Sample space: {1, 2, 3, 4, 5, 6, 7, 8, 9}.
5. A bottle cap is tossed 20 times and the results are
recorded in the table above. What is the probability
that the bottle cap will land up?
6. Find the experimental probability of the bottle cap landing down.
7. Find the experimental probability of the bottle cap landing up or down 1

5. 8. Cass recorded the number of times a spinner landed on each letter. Based on
Cass’ experiment, on which letter is the spinner most likely to land? A
9. On which letter is the spinner least likely to land? B
10. What is the probability of this spinner landing on A?
11. What is the probability of rolling a number greater than 6 on a fair number
cube? 0
12. Raymond has a 95% chance of winning a prize in the spelling contest. What is
the probability that he will not win a prize in the spelling contest? 5%
13. Jessica is preparing lunch for school. She has a choice of chicken or roast beef,
one fruit choice (banana or orange), and one cookie (chocolate chip or oatmeal).
How many different lunches could she make? Draw a tree diagram
Chocolate chip
Banana
Oatmeal
Chicken
Chocolate chip
Orange
Oatmeal
Chocolate chip
Banana
Oatmeal
Roast Beef
Chocolate chip
Orange
Oatmeal
8 choices
14. If Jessica chooses at random, find the probability of
selecting chicken, a banana, and an oatmeal cookie.

6. 15. You go to the local restaurant for lunch. You have 3 choices of pasta, 3 choices
for sauce, and either soup or salad. How many different choices are there for lunch?
Soup
Sauce One
Salad
Soup
Pasta 1 Sauce Two
Salad
Soup
Sauce Three
Salad
Soup
Sauce One
Salad
Soup
Pasta 2 Sauce Two
Salad
Soup
Sauce Three
Salad
Soup
Sauce One
Salad
Soup
Pasta 3 Sauce Two
Salad
Soup
Sauce Three
Salad
18 choices
16. The number cube is rolled and the spinner is
spun. What is the probability that you will roll a 7
and spin white? 0
17. What is the probability that you will
roll 2 and spin yellow?
1• 1
6 3
18. What is the probability that you will roll an even number, and spin purple?
19. About 5% of the items produced by a company are defective. Out of 1,000
items, how many would you predict will be defective? 50 items
20. If you roll a fair 6-sided number cube 100 times, how many times would you
expect to roll an odd number? 50 times