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Worksheets

Probability Review

Total questions: 20

Worksheet time: 10mins

Name
Class
Date
1.
What is the probability of spinning green?
a)
0
b)
1/4
c)
1/2
d)
3/4
2.
What is the probability of spinning red?
a)
0
b)
5/12
c)
1/2
d)
3/4
3.
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
4.

P(not A) *simplest form

a)

6/8

b)

3/4

c)

2/8

d)

1/4

5.
Is the event INDEPENDENT or DEPENDENT?
You have a jar with 24 pieces of chocolate candy and 14 pieces of orange candy.  We take one piece of candy at random from the jar, put it back, and then take a second piece of candy at random from the jar.
a)
Independent
b)
Dependent
6.

Is the event INDEPENDENT or DEPENDENT?

Amy plays card games. She picks a card at random. Then without putting the first card back, she picks a second card at random.

a)

Independent

b)

Dependent

7.
Is the event INDEPENDENT or DEPENDENT?
The spinner is spun twice.  What is the probability that it lands on red first and then blue?
a)
Independent
b)
Dependent
8.

There are 4 black marbles and 2 white marbles in a bag. What is the probability of choosing a black marble, not replacing it, and then choosing white.

a)

4/15

b)

3/17

c)

2/5

d)

2/19

9.
Ricardo has the spinner pictured here and a bag of marbles filled with 2 red marbles, 3 green marbles, and 3 blue marbles. What is the probability that Ricardo spins red on the spinner and picks a red marble out of the bag?
a)
1 ⁄ 16
b)
1 ⁄ 2
c)
1 ⁄ 4
d)
1 ⁄ 8
10.

100% , sure

a)

certain

b)

likely

c)

unlikely

d)

uncertain

11.

What is the probability:

Someone buys a lottery ticket and win the jackpot.

a)

Certain

b)

Likely

c)

Unlikely

d)

Impossible

12.

Shamar can hit a target with a baseball 12 times out of 18 total throws. Based on that rate, what is the approximate probability he will hit the target on his next throw?

a)

12%

b)

18%

c)

50%

d)

67%

13.

Achilles rolled a number cube, labeled 1 through 6, 200 times and recorded each of his results. About how many times could Achilles expect to roll a 3 or 4?

a)

35

b)

70

c)

100

d)

130

14.

McKayla flipped a coin 150 times. How many times could McKayla expect the coin to land on tails?

a)

25

b)

50

c)

75

d)

100

15.
The tree diagram shows the outcomes of rolling a die and flipping a coin.  
What is the probability of rolling an even number and flipping a head?
a)
3/12
b)
1/2
c)
4/12
d)
0/12
16.
The tree diagram shows the outcomes of rolling a die and flipping a coin.  
How many total outcomes are there?  
a)
6
b)
12
c)
24
d)
36
17.
Which shows the sample space for flipping two coins?
a)
H, T
b)
HH, HT, TH, TT
c)
HH, TT
d)
Dime, Nickel
18.

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

19.
In a random survey of 50 students at Great Middle School, 32 said chocolate was their favorite flavor of yogurt. The school has 450 students. How many of them are likely to select chocolate as their favorite flavor? 
a)
144
b)
162
c)
225
d)
288
20.
A principal randomly chose 40 students from grade 5. Of these students, 9 were wearing watches. Based on this information, what is the most reasonable prediction of the number of students wearing watches in a group of 120 students from grade 5?
a)
27
b)
9
c)
18
d)
80