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Simple Probability

Total questions: 30

Worksheet time: 1hrs 6mins

Name
Class
Date
1.
a)

1/2, 50%

b)

1/3, 33.3%

c)

2/3, 66.7%

d)

1/5, 20%

2.
a)

0%

b)

1/6, 16.7%

c)

1/2, 50%

d)

6/6 100%

3.
a)

0%

b)

1/2, 50%

c)

1/6, 16.7%

d)

100%

4.
a)

1/5, 20%

b)

4/5, 80%

c)

2/3, 66.7%

d)

0% impossible

5.

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

6.

What is the probability of spinning a number less than 5?

a)

16 2/3%

b)

33 1/3 %

c)

66 2/3%

d)

83 1/3%

7.

If you spin the spinner 90 times, how many times should the number 3 be selected?

a)

9

b)

15

c)

16

d)

30

8.

What is the probability of spinning a red or spinning a yellow?

a)

1/8

b)

1/16

c)

1/2

d)

1/3

9.

What is the probability of selecting an orange candy?

a)

0%

b)

25%

c)

50%

d)

100%

10.

A spinner is marked with four sections and was spun 100 times. Is this experimental or theoretical probability?

a)

experimental

b)

theoretical

11.

You flip a coin 20 times and record the results. Is this experimental or theoretical probability?

a)

Experimental

b)

Theoretical

12.
The probability of an event occurring, P(A), can be expressed as a fraction, decimal, or percent.
a)
True
b)
False
13.

Michael went to a florist to purchase a flower for his mother. There are 15 roses, 11 calla lilies, 1 lily, and 27 carnations. Which of the following describes the chances of Michael choosing a daisy?

a)

Less Likely

b)

Likely

c)

Even Chance

d)

Impossible

14.

What is the probability of picking a green marble?

a)

10/38

b)

1/5

c)

11/38

d)

5/38

15.

Which type of card has the greatest (biggest) probability?

a)
b)
c)
d)
16.

Experimental probability is: number of times the event occurs/total number of trials

a)

True

b)

False

17.

Theoretical Probability is: number of outcomes favorable to that event/number of possible outcomes

a)

False

b)

True

18.
How do you write 0.02 as a percent?
a)
20%
b)
200%
c)
2%
d)
.02%
19.

Find the probability of not rolling a 2 on a single die.

a)

1/6

b)

2/6

c)

5/6

d)

2

20.

If the probability of an event occurring is 0.4, what is the probability of the event not occuring?

a)

0.4

b)

0.5

c)

0.6

d)

0.1

21.

A bag contains 9 red tiles, 10 blue tiles, and 6 green tiles. A tile is randomly drawn from the bag. Which statement is true?

a)

The probability of drawing a red tile is 36% and the probability of not drawing a red tile is 64%.

b)

The probability of drawing a blue tile is 30% and the probability of not drawing a blue tile is 70%.

c)

The probability of drawing a green tile is 25% and the probability of not drawing a green tile is 75%.

d)

The probability of drawing a red tile is greater than the probability of not drawing a green tile.

22.

What is the complement of it snowing 3 days out of the week?

a)

P' = 4/7

b)

P' = 2/7

c)

P' = 5/7

d)

P' = 3/7

23.

Ava has her music CDs on a shelf in her room. The collection includes 18 dance, 3 rock, 2 country, and 4 jazz. If she randomly selects a CD, how likely is it that it will be a dance CD?

a)

As likely to happen as not

b)

Unlikely

c)

Certain

d)

Most likely

24.

Mollie is playing a game where she is throwing darts at a wall filled with shapes. Her current results are 7 circles, 4 squares, 7 triangles, and 3 pentagons. Which of the followings statements is true?

a)

She is more likely to hit a square than a triangle.

b)

She is less likely to hit a circle than a square.

c)

She is just as likely to hit a triangle as a circle.

d)

She is certain to hit a circle.

25.

A teacher surveyed 20 students on which lunch they wanted at the school field day. The results were 7 hotdogs, 4 salads, and 9 pizza slices. Based on this information, what is the best prediction for all 160 students at the school?

a)

32 students will choose pizza.

b)

56 students will choose hotdogs.

c)

72 students will choose salad.

d)

None will choose salad.

26.

The bar graph shows the results of rolling a number cube __________times

a)

6

b)

50

c)

100

d)

12

27.

The bar graph shows the results of spinning the spinner 200 times. What is the experimental probability of landing on a 3?

a)
b)
c)
d)
28.

Neil tossed a 6-sided die 90 times. The results of his tosses are recorded in the table below: Which number has the experimental probability of 13/90?

a)

1

b)

2

c)

3

d)

4

e)

5

29.

The arrow is spun 15 times and landed 4 times on the section labeled Q. Which statement is true?

a)
b)
c)
d)
30.

On Julie's music playlist, she has 100 jazz songs, 70 hip-hop songs, 50 country songs, and 30 rock songs. She sets her player to choose a song at random. Based on the given information, which statement is true?

a)

The song is twice as likely to be hip-hop as jazz.

b)

The song is half as likely to be jazz as rock or country.

c)

The song is half as likely to be country as rock or jazz.

d)

The song is just as likely to be jazz as rock or hip-hop.