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Probability Review

Total questions: 45

Worksheet time: 2hrs 5mins

Name
Class
Date
1.

Linda is trying to pick out an outfit for school. She has 4 tops, 3 pants, and 5 shoes to pick from. How many total possible outfit combinations does she have?

a)

3

b)

5

c)

12

d)

60

2.

What is the probability of rolling an even number on a die?

a)

0.25

b)

0.5

c)

0

d)

1

3.

In his Halloween bag, Jack got 3 Twix, 8 Snickers, 5 Lollipops, and 4 Reese’s. Jack pulls candy out of his bag at random. What is the probability of Jack pulling out a Twix or a Snickers on one try?

a)

1120\frac{11}{20}

b)

2420\frac{24}{20}

c)

1140\frac{11}{40}

d)

24400\frac{24}{400}

4.
A fair number cube is rolled 60 times. The results of the experiment are shown. For which side of the number cube were the experimental and theoretical probability the closest?
a)
2
b)
5
c)
4
d)
3
5.
A spinner is spun and the results are shown in the chart. 
Which of the following statements is true about the probability of spinning a blue?
a)
The experimental probability and theoretical probability are equal.
b)
The experimental probability is less than the theoretical probability.
c)
The experimental probability is greater than the theoretical probability.
d)
The experimental probability cannot be determined from the data.
6.
Which of the following describes experimental probability?
a)
Perform a situation and count the number of possibilities
b)
Use trials to count the number of desired outcomes
c)
Perform an experiment to determine the probability of an event
d)
Use a formula to determine the expected probability of an event
7.
Which of the following describes theoretical probability?
a)
Perform a situation and count the number of possibilities
b)
Use trials to count the number of desired outcomes
c)
Perform an experiment to determine the probability of an event
d)
Use a formula to determine the expected probability of an event
8.
A bag of candy contains 2 packs of Skittles, 4 Twizzlers, and 10 Reese's cups. What is the probability of reaching into the bag and choosing either a pack of Skittles or a Reese cup?
a)
3/4
b)
1/4
c)
3/8
d)
1/8
9.
A bag of marbles has 8 red marbles and 6 purple marbles. Jennifer will randomly select 1 marble from the bag. What is the probability that she will select a purple marble?
a)
6/8
b)
3/4
c)
6/14
d)
3/7
10.
An ice cream parlor has six different flavors. They have 4 toppings and 2 types of cones. How many possible ice cream combinations are there?
a)
24
b)
48
c)
6
d)
12
11.
Which of the following scenarios does not have 144 different combinations?
a)
A travel agency has 4 different vacation destinations, 3 different flights, and 12 hotel options.
b)
You have 8 shirts, 6 pairs of pants, and 3 pairs of pants.
c)
A restaurant has 12 main dishes, 6 side dishes, and 2 dessert options.
d)
An instrument shop has 80 brass instruments, 39 woodwind instruments, and 25 percussion instruments.
12.
*BONUS* 
When calculating experimental probability, as more trials are conducted, the experimental probability generally gets closer to the theoretical probability. Eventually, the experimental probability will equal theoretical probability. 
a)
True
b)
False
13.
How confident do you feel about our Probability Test tomorrow?
Remember to write down any questions you might have to ask before we begin our test tomorrow.
a)
A
b)
B
c)
C
d)
D or F
14.

A regular 6-sided die is to be rolled once. What is the probability that a number less than 3 is rolled?

a)

1/3

b)

1/6

c)

1/2

d)

2/3

15.
Bag A contains 9 red marbles and 3 green marbles. Bag B contains 9 black marbles and 6 orange marbles. Find the probability of selecting one green marble from bag A and one black marble from bag B.
a)
3/20
b)
1/4
c)
3/31
d)
2/27
16.
A box contains 5 purple marbles, 3 green marbles and 2 orange marbles. Draws are made without replacement. P(1st orange then green)
a)
1/15
b)
2/15
c)
3/31
d)
1/5
17.
A box contains 5 purple marbles, 3 green marbles and 2 orange marbles. Draws are made without replacement.P(both marbles are purple)
a)
2/9
b)
1/3
c)
1/2
d)
1/4
18.

If you select a marble without looking, how likely is it that you will pick a black one?

a)

certain

b)

probable

c)

unlikely

d)

impossible

19.
What is the probability of getting any letter that is not A?
a)
6/8
b)
3/4
c)
2/8
d)
1/4
20.
You flip a coin 20 times and record the results. Is this experimental or theoretical probability?
a)
Experimental
b)
Theoretical
21.
Probability is ...
a)
the chance that some event will occur.
b)
a game that involves coins.
c)
a guarantee.
22.
P(not A) = 
*Remember to simplify.*
a)
6/8
b)
3/4
c)
2/8
d)
1/4
23.
The probability of it raining today is 30%.  What is the probability that it will NOT rain?
a)
30%
b)
70%
c)
100%
d)
0%
24.

Drake Marketing and Promotions has randomly surveyed 200 men who watch professional sports. The men were separated according to their educational level (college degree or not) and whether they prefer the NBA or the National Football League (NFL). The results of the survey are shown:


What is the probability that a randomly selected participant prefers NFL? (answer as a decimal)

(a)  

25.
Theoretical Probability is?
a)
What Should happen
b)
What does happen
c)
What Will Happen
d)
What I want to Happen
26.

A letter from the word MATH is chosen at random, then a coin is flipped. What is the probability of choosing the letter 'm' then getting tails?

a)

17/26

b)

1/8

c)

5/13

d)

1/6

27.
You roll a pair of number cubes (dice). Which equation represents how to find the probability of rolling a 2 and an odd number?
P(2, then odd)
a)
⅙ x ½ = 1/12
b)
⅙ + ½ = 2/8
c)
 ½ x ½ = 1/4
d)
⅓ + ½ = 5/6
28.
The cafeteria is serving three kinds of sandwiches:  tuna (T), chicken, (C), and peanut butter (P).  They are also serving a choice of two drinks:  milk (M) or water (W).  Which shows the complete set of possible combinations?
a)
TW, CW, PW
b)
TW, TM, TC, CW, PW
c)
TW, TM, CW, CM, PW, PM
d)
TCP, MW
29.
A compound event is..
a)
an event that directly causes another
b)
the probability of all the outcomes
c)
1 event that creates 2 results
d)
when 2 or  more independent events work together
30.

What is sample space?

a)

a process with an uncertain result

b)

a possible result of an action

c)

a list of all possible outcomes of an event

d)

a single outcome or group of outcomes

31.
What is an outcome?
a)
The result of an experiment
b)
The chance or likelihood of an event
c)
A fraction, decimal, or a percent
d)
An activity that gives various results
32.
Probability can be written as ...
a)
a fraction
b)
a decimal
c)
a percent
d)
all of the above
33.
Find the probability of rolling a 7 on a single die.
a)
1/6
b)
7/6
c)
0
d)
7/7
34.

A tree diagram is useful in determining the __________of a probability experiment.

a)

result

b)

possible outcomes

c)

event

d)

none of the above

35.

Two dice are rolled and it is recorded whether the result on each is odd or even. What is the probability both are odd?

a)

1/4

b)

1/2

c)

2/4

d)

3/4

36.
How many total outfit options are represented?
a)
12
b)
22
c)
3
37.

Which tree diagram has the most possible outcomes?

a)
b)
c)
38.

What is the probability that the dessert doesn't have peanut butter in it?

a)

1.16

b)

0.41

c)

0.38

d)

0.78

39.

What is the chance that the dessert is brownies and has peanut butter in it?

a)

0.94

b)

0.58

c)

0.99

d)

0.95

40.

Jason can choose 1 pair of pants and one shirt to wear today. Here are his choices. Which tree diagram shows all of the combinations that Jason can choose from?

a)
b)
c)
d)
41.

How do you write 1/2 as a decimal?

a)

.25

b)

.12

c)

.5

d)

.75

42.

How do you write 1/2 as a percent?

a)

25%

b)

.5%

c)

100%

d)

50%

43.

The sum of all the possible probabilities should add up to 1

a)

Always true

b)

Sometimes true

c)

Always false

44.

Probability is always a number between 0 and 1

a)

True

b)

False

45.
Express 0.08 as a percent.
a)
0.08%
b)
80%
c)
8%
d)
0.008%

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