WorksheetsProbability Pre Test
Total questions: 20
Worksheet time: 28mins
Name
Class
Date
1.
What is the probability of spinning green?
a)
0
b)
1/4
c)
1/2
d)
3/4
2.
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
3.
A box contains 5 purple marbles, 3 green marbles and 2 orange marbles. Draws are made without replacement.P(both marbles are purple)
a)
2/9
b)
1/3
c)
1/2
d)
1/4
4.
A jar contains 4 white chips, 5 purple chips, and 1 black chip. Chips are selected randomly one at a time, and are not replaced.
P(white, then purple, then black)
P(white, then purple, then black)
a)
1/36
b)
2/39
c)
5/41
d)
6/43
5.
Pablo chooses a colored marble from a mixed bag and writes down the color. Pablo leaves it out and then draws another.
a)
Independent
b)
Dependent
6.
Find the experimental probability of spinning Letter Q.
a)
15/15
b)
3/10
c)
3/50
d)
7/10
7.
a)
1/48
b)
1/6
c)
1/8
d)
1/24
8.
40% of students in a school wore blue on a Spirit Day. If two students are randomly selected, what is most likely the probability that both students will not be wearing blue?
a)
16%
b)
36%
c)
40%
d)
60%
9.
A store sells shirts that are either small, medium, or large. The colors are either red, blue, green, or white. What is the probability someone will select a large green shirt?
a)
1/3
b)
1/7
c)
1/9
d)
1/12
10.
Which event is not a dependent event?
a)
Picking 2 students to each be line leader and door holder from a group of 20 students
b)
Picking 2 marbles from a bag without replacing the first marble
c)
Picking 2 crayons from a box at the same time (simultaneously)
d)
Picking an earring, replacing it, then picking a 2nd earring
11.
If I flip a coin 10 times, how many times should I get heads?
a)
1
b)
10
c)
3
d)
5
12.
What is the probability of rolling a dice and landing on a 4, and then rolling the dice again and landing on any even number?
a)
1 ⁄ 6
b)
1 ⁄ 8
c)
1 ⁄ 2
d)
1 ⁄ 12
13.
Describe the event as independent or dependent: Susie draws a card from a deck of cards and replaces it. She then draws a second card.
a)
Independent
b)
dependent
14.
Use the table to determine the probability of a boy speaking German.
a)
.08
b)
.73
c)
.4
d)
.32
15.
What is the probability of a student speaking Spanish?
a)
50%
b)
40%
c)
30%
d)
20%
16.
What is the probability a student speaks French given they are a girl?
a)
.1
b)
.24
c)
.4
d)
.86
17.
The probability of A is given P(A) = .4 and the probability of B is given P(B)=.25. If the Probability of the intersection (A AND B) is .13, Find the probability of choosing A OR B. Hint - use the addition rule!
a)
.5
b)
.78
c)
.13
d)
.52
18.
The probability of A is given P(A) = .4 and the probability of B is given P(B)=.25. If the Probability of the intersection (A AND B) is .13, Find the probability of choosing A OR B. Hint - use the addition rule!
a)
.5
b)
.78
c)
.13
d)
.52
19.
The digits 0 through 19 can be used to create a code for combination lock. How many different four digit combinations can you make?
a)
160,000
b)
130,321
c)
80
d)
80,000
20.
Classify the following as an action, sample space or event.Roll a 5 on a dice.
a)
Action
b)
Sample Space
c)
Event
100 %
