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Math 8 Probability Long Quiz

Total questions: 30

Worksheet time: 1hrs 20mins

Name
Class
Date
1.
What is the probability of spinning green?
a)
0
b)
1/4
c)
1/2
d)
3/4
2.
The chart below represents the number of marbles in a jar.
P(green) = 
a)
5/19
b)
10/28
c)
5/14
3.
Find the experimental probability of spinning Letter Q.
a)
15/15
b)
3/10
c)
3/50
d)
7/10
4.
Review: A list of all possible outcomes of a trial is called the ___________ of that trial.
a)
experiment
b)
sample space
c)
Event
d)
range
5.
All of the possible results of an event are called....
a)
favorable outcomes
b)
events
c)
Outcomes
d)
experiments
6.

Probabilities are always between...

a)

0 & 1

b)

0 & 1000

c)

1 & 100

d)

2 & 1

7.
If you choose from the following M & M colors, what is the probability that you choose blue?
5 green
6 yellow
8 blue
7 brown
a)
8/26
b)
4/13
c)
8/25
d)
1/3
8.
The probability of an event occurring, P(A), can be expressed as a fraction, decimal, or percent.
a)
True
b)
False
9.
Probability is ...
a)
the chance that some event will occur.
b)
a game that involves coins.
c)
a guarantee.
10.
A number is randomly selected from 0-10. What is the probability the number selected is greater than 5?
a)
1/2
b)
3/5
c)
2/5
d)
5/11
11.
The letters that form the word ALGEBRA are placed in a bowl. What is the probability of choosing a letter other than “A”? 
a)
2/7
b)
5/49
c)
5/7
d)
10/49
12.

A fruit basket contains 9 apples, 3 bananas, 7 oranges, 5 pears, and 1 grapefruit. Kyle randomly chooses a fruit, does not replace it, then chooses another. What is the probably that he chose two pears?

a)

9/49

b)

4/125

c)

1/10

d)

1/30

13.
Find the probability of flipping a heads on a coin, and then getting the color yellow on a spinner with 6 colors. 
a)
1/12
b)
2/9
c)
3/7
d)
7/19
14.

Three fair coins are flipped at the same time. What is the probability that all three will be display heads?

a)

1/8

b)

1/3

c)

1/4

d)

1/2

e)

1/6

15.

a situation involving doing the activity that leads to results or outcomes.

a)

complement

b)

outcome

c)

dependent

d)

experimental

16.
Possible results of an event
a)
outcomes
b)
compound event
c)
simple event
d)
probability
17.
The probability of an event is written as P(event).
a)
False
b)
True
18.

Identify the following scenario as experimental or theoretical:


Samantha flips a coin 10 times and the result is heads 7 times. She concludes that the probability of getting heads must be 7/10

a)

Experimental

b)

Theoretical

19.
In a random survey of 50 students at Great Middle School, 32 said chocolate was their favorite flavor of yogurt. The school has 450 students. How many of them are likely to select chocolate as their favorite flavor? 
a)
144
b)
162
c)
225
d)
288
20.
The table shows the number of votes for different school mascots. Based on the information in the table, what is the most reasonable prediction of the number of votes for eagle out of the next 25 votes?
a)
72
b)
8
c)
1
d)
21
21.
P(not A) = 
*Remember to simplify.*
a)
6/8
b)
3/4
c)
2/8
d)
1/4
22.
If a stone is dropped at random on the arrangement of tiles shown, what is the probability the stone lands on a black tile?
a)
5/9
b)
4/9
c)
1/2
d)
1/9
23.
Which is the best way to simulate choosing one student out of 12 to be the class president?
a)
roll a die and flip a coin
b)
roll a die
c)
spin a spinner with 4 sections
d)
flip a coin
24.

A dice was rolled five times and the following were rolled: 1, 3, 3, 4, 4

Based on this information, find the experimental P(1).

a)
3/5
b)
1/6
c)
2/5
d)
1/5
25.
a)

1/7

b)

2/7

c)

3/7

d)

4/7

e)

5/7

26.
a)

0

b)

1/6

c)

1/2

d)

1

27.

How many red cards are in a standard deck of cards?

a)

16

b)

20

c)

26

d)

13

28.

Sarah, Sammie, Victor, Vicki, Valerie are in a math group. Two students are randomly chosen to be co-leaders. What is the probability that both students' names begin with the letter V?

a)

3/5 times 3/5 = 9/25

b)

3/5 times 1/2 = 3/10

c)

1/5 times 2/5 = 2/15

d)

3/5 times 1/4 = 3/20

29.

The letters in MATHEMATICS are written on slips of paper and placed in a bag. Letters are chosen at random.

What is the probability that you will choose a consonant?

a)

811\frac{8}{11}  

b)

211\frac{2}{11}  

c)

411\frac{4}{11}  

d)

711\frac{7}{11}  

30.

Miss Collins predicts that 82% of her students will pass the quiz on Thursday. Find the probability of the students who will not pass the test on Thursday.

a)

18%

b)

82%

c)

20%

d)

15%

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