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Introduction to Probability Review

Total questions: 12

Worksheet time: 28mins

Name
Class
Date
1.

The table lists the probability of four events occurring.

Which event is least likely to occur?

a)

Event A

b)

Event B

c)

Event C

d)

Event D

2.

A box contains 1 red ball, 3 green balls, and 8 blue balls. What best defines the probability associated with picking a red ball without looking?

a)

Likely

b)

Certain

c)

Unlikely

d)

Impossible

3.

A bag contains 50 pieces of gum flavored cherry, grape, and watermelon. William will randomly pick a piece of gum. The probability of picking cherry is 1/5. the probability of picking watermelon is 7/10.


What is the probability William will pick a piece of grape gum?

a)

1/10

b)

3/10

c)

2/5

d)

4/5

4.

The numbers 3, 45, 22, 35, 17, 79, and 6 are written on pieces of paper and placed in a bag. A piece of paper is chosen randomly out of the bag. How likely is it that one the paper will be an odd number?

a)

Impossible

b)

Unlikely

c)

Likely

d)

Certain

5.

What is the probability that the spinner will land on either yellow (Y) or green (G)?

a)

¼

b)

c)

½

d)

6.

Lisa has a bag of 30 beads to make jewelry.

There are an equal number of orange, green and blue beads. Those are the only colors.

Lisa chooses a bead randomly from the bag.

What is the probability that she will choose a green or blue bead?

a)

5/6

b)

2/3

c)

1/2

d)

1/6

7.

Ashley will roll a fair number cube. The number cube is labeled 1 to 6. What is the probability that Ashley will roll a number greater than 4?

a)

2/3

b)

1/2

c)

1/3

d)

1/6

8.

You have a spinner 4 equal sections: red, blue, yellow, green.


What is the probability of a player spinning the color blue?

a)

1/4

b)

1/6

c)

1/24

d)

5/12

9.

You have a 6-sided die.


What are the chances that a player will roll a number less than six?

a)

unlikely

b)

even chance

c)

certain

d)

very likely

10.

Carlotta has a blue sweater, a red sweater, a pink sweater, and a white sweater.

She also has a pair of black pants and a pair of brown pants.


Which of the following describes the sample space available?

a)

4 outcomes

b)

6 outcomes

c)

8 outcomes

d)

10 outcomes

11.
How many total outfit options are represented?
a)
12
b)
22
c)
3
12.
What is the probability of spinning an even number? 
a)
equally likely
b)
very likely 
c)
certain
d)
impossible