
M7 Inves #8 Probability, Chance and Odds
Presentation
•
Mathematics
•
6th - 8th Grade
•
Medium
natalie richardson
Used 7+ times
FREE Resource
10 Slides • 34 Questions
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By natalie richardson
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Recall that Probability is the ratio of favorable outcomes to possible outcomes.
#possible outcomes
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If we spin the spinner, the probability that it stops on 1 is 1/4.
We can express the probability as ¼ or 0.25 or 25%.
The COMPLEMENT of this event is the spinner not stopping on 1.
This probability is ¾ or 0.75 or 75%.
4
Multiple Select
What is the probability of the spinner landing on 3. Select all that apply.
1/4
25%
.3
.25
5
Multiple Select
What is the probability of the complement of the spinner landing on 4. Select all that apply.
1/4
25%
.75
.25
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Another way to express the likelihood of an event is as ODDS.
The ODDS is the ratio of favorable to unfavorable outcomes.
#unfavorable outcomes
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If we spin the spinner, the odds that it stops on 1 are 1 to 3.
We can express the odds as 1 to 3 or 1:3.
Odds express the relationship between an event and its complement.
Although we do not write odds as a fraction, we always reduce the relationship.
8
Multiple Select
What are the oddes the spinner will land on 4? Select all that apply.
1:4
2:6
1:3
1 to 3
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Probability can be expressed as a fraction, decimal or percent.
We use the word CHANCE when expressing probability in percent form.
What is the chance of the spinner stopping on 2?
10
Multiple Choice
What is the chance the spinner will not land on 4?
.75
75%
3 to 1
1 to 3
11
Multiple Choice
The weather forecast stated that the chance of rain is 40%. What is the chance that it will not rain?
40%
0.6
60%
50%
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What is the probability of picking blue?
What is the probability of not picking blue?
What are the odds of picking blue?
One marble is drawn from a bag containing 3 red marbles, 4 white marbles, and 5 blue marbles.
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What is the probability of picking red?
What is the probability of not picking red?
What are the odds of picking red?
One marble is drawn from a bag containing 3 red marbles, 4 white marbles, and 5 blue marbles.
14
Multiple Choice
One marble is drawn from a bag containing 3 red, 4 white and 5 blue marbles.
What is the probability of picking a white marble?
7/12
1/2
4/12
1/3
15
Multiple Choice
One marble is drawn from a bag containing 3 red, 4 white and 5 blue marbles.
What is the probability of not picking a white marble?
8/12
1/2
2/3
3/4
16
Multiple Choice
One marble is drawn from a bag containing 3 red, 4 white and 5 blue marbles.
What are the odds of picking a white marble?
4:8
1 to 2
4 to 12
1/3
17
Multiple Choice
One marble is drawn from a bag containing 3 red, 4 white and 5 blue marbles.
What is the chance of not picking a red marble?
75%
1/4
25%
3/4
18
Poll
A meteorologist forecast the chance of rain as 20%
According to the forecast, what is the chance that it will not rain?
20%
80%
50%
You can never know about rain
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Poll
A meteorologist forecast the chance of rain as 20%
According to the forecast, what are the odds of rain?
20 to 80
1 to 5
1 to 4
20 to 100
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For example, “getting heads twice” with two flips of a coin is a compound event.
A compound event is composed of two or more simple events.
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To find the probability of two or more events occurring in a specific order, we multiply the probabilities of the events.
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Open Ended
A die is rolled and a coin is tossed.
What is the sample space for this experiment?
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Multiple Choice
What is the probability of tossing a coin and rolling a die and getting TAILS and a 6?
1/12
1/5
1/6
1/2
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Multiple Choice
What are the odds of tossing a coin and rolling a die and getting TAILS and a 6?
1 to 2
1 to 11
1 to 10
1 to 12
25
Multiple Choice
What is the probability of tossing a coin and rolling a die and getting HEADS and an odd number?
1/12
1/5
1/6
1/4
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Open Ended
A coin is tossed and a spinner is spun.
What is the sample space for this experiment?
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Multiple Choice
A coin is tossed and a spinner is spun.
What is the probability of getting TAILS and GREEN?
1/4
1/2
1/8
1/3
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Multiple Choice
A coin is tossed and a spinner is spun.
What are the odds of getting TAILS and GREEN?
1 to 2
1 to 6
1 to 8
1 to 7
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Multiple Choice
A coin is tossed and a spinner is spun.
What is the probability of getting HEADS and RED or ORANGE?
1/4
1/2
1/8
1/3
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Multiple Choice
A coin is tossed and a spinner is spun.
What are the odds of getting HEADS and RED or ORANGE?
1 to 1
1 to 3
1 to 2
1 to 4
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Open Ended
A die is rolled and a spinner is spun.
What is the sample space for this experiment?
32
Multiple Choice
A die is rolled and a spinner is spun.
What is the probability of getting BLUE and 2?
1/4
1/12
1/24
1/8
33
Multiple Choice
A die is rolled and a spinner is spun.
What are the odds of getting BLUE and 2?
1 to 24
1 to 12
1 to 23
1 to 8
34
Multiple Choice
A die is rolled and a spinner is spun.
What is the probability of getting ORANGE and 1, 2, OR 3?
1/4
1/12
1/24
1/8
35
Multiple Choice
A die is rolled and a spinner is spun.
What are the odds of getting ORANGE and 1, 2, OR 3?
1 to 8
1 to 12
1 to 7
1 to 23
36
Multiple Choice
A coin is flipped and a spinner is spun.
What is the probability of getting heads and not spinning blue?
1/8
1/2
1/4
3/8
37
Multiple Choice
A coin is flipped and a spinner is spun.
What are the odds of getting heads and not spinning blue?
3 to 5
1 to 2
1 to 8
3 to 8
38
Multiple Choice
A coin is flipped three times.
What is the probability of getting heads all three times?
1/2
1/4
1/6
1/8
39
Multiple Choice
A coin is flipped three times.
What are the odds of getting heads all three times?
1 to 8
1 to 12
1 to 7
1 to 23
40
Multiple Choice
A die is rolled two times.
What is the probability of getting 6 both times?
1/6
1/5
1/12
1/36
41
Multiple Choice
A die is rolled two times.
What are the odds of getting 6 both times?
1 to 5
1 to 6
1 to 35
1 to 23
42
Multiple Choice
A coin is flipped and a spinner is spun.
What is the chance of getting heads and yellow?
50%
10%
0%
100%
43
Multiple Choice
The probability of selecting a heart by drawing one card from a normal deck of cards is 0.25. What is the chance that a card drawn is a heart?
25%
75%
1/4
50%
44
Multiple Choice
The probability of selecting a heart by drawing one card from a normal deck of cards is 0.25. What is the chance that a card drawn is not a heart?
1/52
75%
25%
50%
By natalie richardson
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