Name: ________________________ Class: ___________________ Date: __________
ID: A
Unit 2 Posttest Study Guide
____
1. Sarah rolled a number cube 30 times and recorded the results. She found that she rolled an even number 16
16
times. What does
represent?
30
a.
b.
c.
d.
____
theoretical probability
sample space
experiment
experimental probability
2. Carey has a bag of marbles. There are 4 red marbles, 5 blue marbles, and 1 green marble. She conducted an
experiment in which she pulled out one marble and recorded the color and then returned it to the bag 50
times. Her results are shown in the table.
Result
Tally
Total
Red
22
Blue
24
Green
4
What is the difference between the theoretical probability and the experimental probability of picking a green
marble?
a.
b.
c.
d.
1
50
1
10
2
25
1
1
Name: ________________________
____
ID: A
3. Dean has a spinner that is divided into 4 equal sections. The sections are labeled 1, 2, 3, and 4.
Dean spun the spinner 60 times. He recorded the results in the table below.
Result
Tally
Total
1
12
2
17
3
15
4
16
What is the experimental probability of spinning a 2?
a.
b.
c.
d.
____
4. What is another way to describe an event with a probability of 0?
a.
b.
c.
d.
____
17
43
17
60
1
4
17
certain
unlikely
equally likely
impossible
5. What is the probability of rolling a number less than 2 on a number cube?
a.
b.
c.
d.
1
6
1
5
1
4
1
2
2
Name: ________________________
____
6. What is the greatest possible probability in any experiment?
a.
b.
c.
d.
____
3 times
4 times
6 times
12 times
8. A fair 6-sided cube has a different color on each side–red, blue, green, orange, purple, and yellow. Evan rolls
the cube 3 times. What is the probability that he will roll purple all 3 times?
a.
b.
c.
d.
____
9
10
1
10
100
7. Breanna is conducting an experiment with a number cube. She rolled the cube 24 times. How many times
could she expect the cube to land on 6?
a.
b.
c.
d.
____
ID: A
1
6
1
27
1
216
1
729
9. A cafe offers 4 different sandwiches on its lunch menu. Each day, Sherise randomly chooses a sandwich.
Which calculation shows the number of possible orders of sandwiches that she can choose during a 3-day
period?
a.
b.
c.
d.
43
432
444
4433
____ 10. You are playing a game of Scrabble and have the 5 A tiles, 3 E tiles, 1 Z tile, 2 M tiles, 3 L tiles, and 1 Y tile
to choose from. What is the probability that you choose E or Y on your next draw?
1
3
a.
c.
5
225
1
4
b.
d.
3
15
3
Name: ________________________
ID: A
____ 11. You are playing a game of Scrabble and have the 5 A tiles, 3 E tiles, 1 Z tile, 2 M tiles, 3 L tiles, and 1 Y tile
to choose from. What is the probability that you choose M or L on your next draw?
2
1
a.
c.
75
5
3
1
b.
d.
10
3
____ 12. A bag contains seven red marbles andeight blue marbles. You randomly pick a marble and then pick a second
marble without returning the marbles to the bag. Both marbles are red.
2
4
 0.267
a. Independent;  0.222
c. Dependent;
9
15
1
1
 0.02
b. Independent;
d. Dependent;  0.2
49
5
____ 13. There are eleven shirts in your closet, four blue and seven green. You randomly select one to wear on
Monday and then a different one on Tuesday. You wear blue shirts on both days.
1
6
 0.063
 0.109
a. Independent;
c. Dependent;
16
55
2
20
 0.182
 0.247
b. Dependent;
d. Independent;
11
81
____ 14. A cooler contains eleven bottles of sports drink: three lemon-lime flavored, five orange flavored, and three
fruit-punch fllavored. You randomly grab a bottle. It is a lemon lime or an orange.
8
1
 0.727
a. Mutually Exclusive;
c. Mutually Inclusive;  0.25
11
4
2
1
b. Mutually Exclusive;  0.4
d. Mutually Inclusive;  0.333
5
3
____ 15. A basket contains six apples and four peaches. Two of the apples and three of the peaches are rotten. You
randomly pick a piece of fruit. It is freash or is an apple.
8
5
 0.615
a. Not mutually exclusive;
c. Mutually exclusive;  0.714
13
7
7
7
 0.7
 0.636
b. Not mutually exclusive;
d. Not mutually exclusive;
10
11
____ 16. A bag contains 3 red marbles and 2 blue marbles. With replacement, what is the probabilty of drawing a red
marble on the first and drawing a red marble on the second draw.
a. 10%
c. 36%
b. 20%
d. 46%
4