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Probability (Year 7)

Total questions: 20

Worksheet time: 45mins

Name
Class
Date
1.

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

2.

You have a 3 tops, 2 pants and 2 shoes. How many total outfit options are represented?

a)

12 outfits

b)

22 outfits

c)

3 outfits

d)

7 outfits

3.

What is the probability that you will get plain crust with ham on your pizza?

a)

1/8

b)

1/2

c)

1/10

d)

2/10

4.

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)
5.

There are 8 counters in a bag, 1 is red.


I take one counter, replace it, then take another.

What is the probability of taking a red counter on the first go?

a)

1/8

b)

7/8

c)

1/7

d)

6/7

6.

Bert & Ernie choose a juice to have for breakfast.

The probability that Bert chooses orange is 3/4.

If Bert chooses orange, the probability that Ernie chooses orange is 4/5.

If Bert chooses apple the probability that Ernie chooses apple is 2/3.

Find the value of the probability marked c.

a)

1/4

b)

1/5

c)

1/3

d)

3/4

7.

A 10-cent coin is tossed and an ordinary six-sided die is rolled.

How many possible outcomes are there?

a)

2

b)

6

c)

12

8.

One bag contains 1 red counter, 2 yellow counters and 1 blue counter. Another bag contains 1 yellow counter, 2 red counters and 1 blue counter. One counter is taken at random from each bag.


Find the probability that two yellow counters are chosen.

a)

1/16

b)

1/8

c)

1/4

d)

1/2

9.
What is the probability that a student plays an instrument?
a)
.55
b)
.5
c)
.45
d)
.4
10.

A regular 6-sided die is to be rolled one time. What is the probability that the number 5 is rolled?

a)

1/5

b)

5/6

c)

1/6

d)

6/5

11.

A coin is tossed and then a regular 6-sided die is rolled. What is the probability of the resulting outcome being

(tails, even)?

a)

1/2

b)

1/12

c)

1/6

d)

1/4

12.
Probability can be written as ...
a)
a fraction
b)
a decimal
c)
a percent
d)
all of the above
13.
Theoretical Probability is?
a)
What Should happen
b)
What does happen
c)
What Will Happen
d)
What I want to Happen
14.
Experimental Probability is:
a)
What Will happen 
b)
What actually happens
c)
What should happen
d)
What I think Happens
15.
What is the probability of spinning red?
a)
0
b)
5/12
c)
1/2
d)
3/4
16.
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
17.
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
18.
A set of all possible outcomes is known as - 
a)
a list
b)
a complement
c)
a sample space
d)
an event
19.

Based on the chart, what is the experimental probability of pulling a green marble?

a)

1/8

b)

8/25

c)

8/100

d)

7/8

20.
P(not A) = 
*Remember to simplify.*
a)
6/8
b)
3/4
c)
2/8
d)
1/4