3–14
Name
Date
Play With Spinners
Make a spinner like the one shown. Use the tip of a pencil to hold a paper clip in place in the
middle of the spinner. Then “flick” the paper clip to spin the spinner.
1.
What is the probability of spinning an A? B? C?
B
A
A
C
B
A
2.
Predict If you spin the spinner 30 times, how many times on average will you get an
A? B? C?
3.
Spin the spinner 30 times and record
the results of each spin.
Did the actual results match
your predictions in exercise 2?
Spin
Frequency
A
B
4.
How do the actual probability results compare with the predicted probability results the
more times you spin the spinner?
5.
Spin the spinner 30 more times and record
the results of each spin.
How did your second 30 spins compare with
the first 30 spins?
Spin
Frequency
A
B
C
6.
Add the results from exercise 3 and exercise 5. How do the actual probability results
from the two sets compare with the predicted results?
Copyright © Houghton Mifflin Company. All rights reserved.
C
3–14
Name
Date
Play With Spinners
Make a spinner like the one shown. Use the tip of a pencil to hold a paper clip in place in the
middle of the spinner. Then “flick” the paper clip to spin the spinner.
1.
What is the probability of spinning an A? B? C?
B
A ᎏ1ᎏ; B ᎏ1ᎏ; C ᎏ1ᎏ
2
2.
3
6
A
A
C
B
A
Predict If you spin the spinner 30 times, how many times on average will you get an
A? B? C?
A 15; B 10; C 5
3.
Spin the spinner 30 times and record
the results of each spin.
Did the actual results match
your predictions in exercise 2?
Answers will vary.
4.
Spin
Frequency
A
B
C
How do the actual probability results compare with the predicted probability results the
more times you spin the spinner?
Possible answer: The more times the spinner is spun,
the predicted probability.
5.
Spin the spinner 30 more times and record
the results of each spin.
How did your second 30 spins compare with
the first 30 spins?
Answers will vary.
6.
Spin
Frequency
A
B
C
Add the results from exercise 3 and exercise 5. How do the actual probability results
from the two sets compare with the predicted results?
Answers will vary.
Copyright © Houghton Mifflin Company. All rights reserved.
the more likely it is that the actual probability will match