Name: 
 

Lesson 1: Exploring Probability



 1. 

Use the following information to answer the questions below.

There are 20 marbles in a bag.  The marbles are the following colours:

7 white,   4 black,  5 green,  4 red

Which colour is the most likely to be selected from the bag?
a.
white
b.
black
c.
green
d.
red
 

 2. 

Which colour is the least likely to be selected from the bag?
a.
white
b.
red
c.
black
d.
black and red
 

 3. 

What is the probability of selecting a red marble?
a.
1/5
b.
6/20
c.
7/10
d.
1/4
 

 4. 

What is the probability of selecting a white marble?
a.
10/20
b.
5/20
c.
4/20
d.
7/20
 

 5. 

What is the probability of selecting a green marble?
a.
12/20
b.
4/20
c.
1/4
d.
5/10
 

 6. 

Keenan is tossing a coin.   Which statement is true?
a.
Keenan is more likely to flip heads.
b.
Keenan is more likely to flip tails.
c.
Keenan is equally likely to flip tails or heads.
d.
Keenan is not likely to flip heads or tails.
 

 7. 

Use the diagram below to answer the following questions.

    
    
    
    

If Milo selected a square at random, which colour would he most likely select?
a.
black
b.
white
c.
neither black or white
d.
he is equally likely to select black or white
 

 8. 

What is the probability of selecting a white square?
a.
3/4
b.
1/4
c.
10/16
d.
5/16
 

 9. 

What is the probability of selecting a black square?
a.
12/16
b.
1/4
c.
5/8
d.
5/16
 

 10. 

When you roll a 6-sided die, what is the probability of rolling an even number?
a.
1/2
b.
1/4
c.
3/4
d.
1/6
 



 
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