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Probability 2022 Flashcards | StudBud
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Probability 2022
Probability 2022
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Probability questions for statistics class. #probability
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Questions
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Answers
1
What is a sample space?
The set of all possible outcomes of an event.
The solution set of an event.
The area where samples are.
The favorable outcomes of an event.
2
Five coins are tossed. What is the probability of getting five heads, P(5 heads)?
1/16
1/32
1/2
1
3
What are dependent events?
Events where the probabilities ARE NOT related.
Events that have no common outcomes.
Events where the probabilities ARE related.
Events that have common outcomes.
4
What is the probability of rolling a number
greater than 4
?
0
1
1/3
1/2
5
What is the probability of randomly choosing a vowel (a,e,i,o,u) from the English alphabet?
5/26
None of these.
21/26
1/21
6
You roll a fair six-sided die once. What is the probability of getting an
even number
?
1/3
1/6
1/2
0
7
Given an event A, which of the following probability rules is incorrect?
0\le P\left(A\right)\le1
The sum of the probabilities of all the outcomes in a sample space is 1.
If event A is certain, then P\left(A\right)>1
If event A cannot occur, then P\left(A\right)=0
8
If the probability of an event happening is ¼, then the probability of it not happening is ¾.
False
True
9
If I toss a fair coin five times and get all tails, what is the probability that tails appears on the next toss?
2/3
1/2
1
0
10
The Venn diagram below represents
Nonmutaually exclusive events
Independent Events
Mutually Exclusive Events
The complement of A
11
Given a bag with 12 red and 7 green marbles, what is the probability of randomly selecting a
red
one?
1/2
7/12
7/19
12/19
12
If an event is
impossible
, it has a probability of zero.
False
True
13
What is the probability that you draw an
ace
from a well-shuffled deck?
1/2
1/13
0
1/4
14
If an event is
certain to occur
, it has a probability of zero.
False
True
15
Two dice are rolled. What is the probability that the sum is 12?
1/36
0
1/6
1/12
16
What is the probability that a number less than 7 will appear when you roll a die one time?
0
1
1/2
1/6
17
A single die is rolled 4 times, what is the probability of getting at least one 6?
51.8%
625/1296
671/1296
48.2%
18
What is the probability that you draw a
diamond
from a well-shuffled deck of cards?
0
1/2
1/13
1/4
19
Given 12 red, 7 green, and 6 blue marbles, w/o replacement what is the probablility of selecting a
red
marble second?
12/25
156/600
144/625
12/24
20
A card is drawn at random from an ordinary deck of cards. Find the probability that it is either a 9
or
a diamond.
13/52
4/13
17/52
4/52
21
Two events are independent if the occurrence of one doesn't affect the probability of the other
False
True
22
The area shaded in green is which of the following?
A ∩ B
P\left(A\ and\ B\right)
A ∪ B
The complement of A
23
The area shaded in green is which of these?
The complement of A
A ∩ B
A ∪ B
None of these.
24
A women has three sons. What is the probability that her next child will be a girl?
0
1/2
1/4
1/8
