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Probability
Probability
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Probability questions for statistics class.
Flashcards
33 cards
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Practice quiz
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Questions
33
Answers
1
What is the probability of the empty set, P(∅)?
1/2
3/4
1
0
2
What is the symbol for the empty set?
Ω
∅
∩
⊂
3
Which of the following experiments does
NOT have equally likely outcomes
?
Toss a coin.
Choose a number at random from 1 to 7.
Choose a letter at random from the word SCHOOL.
4
The area shaded in green is which of the following?
A ∩ B
None of these.
A ∪ B
The complement of A
5
What is the probability of rolling a number
greater than 4
?
0
1/2
1
1/3
6
What is the probability of rolling a 7 when you roll one standard die one time?
1/6
3/6
5/6
0
7
A women has three sons. What is the probability that her next child will be a girl?
1/4
1/8
0
1/2
8
You roll a fair six-sided die once. What is the probability of getting an
even number
?
1/2
1/3
1/6
0
9
If the probability of an event happening is ¼, then the probability of it not happening is ¾.
True
False
10
On a single roll of a standard die, what is the probability that an odd number will appear?
0
1
3/6
1/6
11
What is the probability of randomly choosing a vowel (a,e,i,o,u) from the English alphabet?
None of these.
21/26
1/21
5/26
12
What is the probability that you draw a
diamond
from a well-shuffled deck of cards?
1/4
0
1/13
1/2
13
What are dependent events?
Events where the probabilities ARE related.
Events where the probabilities ARE NOT related.
14
Two events are independent if the occurrence of one doesn't affect the probability of the other
False
True
15
Given a bag with 12 red and 7 green marbles, what is the probability of randomly selecting a
red
one?
7/19
7/12
1/2
12/19
16
If I toss a fair coin, what is the probability that tails appears?
1
1/2
None of the these
0
17
The area shaded in green is which of the following?
None of these.
The complement of A
A ∪ B
A ∩ B
18
If an event is
certain to occur
, it has a probability of zero.
False
True
19
Two coins are tossed. What is the probability of getting two heads, P(HH)?
1
0
1/4
1/2
20
Two dice are rolled. What is the probability that the sum is 12?
1/12
1/6
0
1/36
21
What are independent events?
Events where the probabilities ARE NOT related.
Events where the probabilities ARE related.
22
What is sample space, S?
The favorable outcomes of an event.
The total possible outcomes of an event.
The area where samples are.
23
What is the probability that a number less than 7 will appear when you roll a die one time?
1
1/2
1/6
0
24
On a single roll of a standard die, what is the probability that a 3 will NOT appear?
1/6
3/6
0
5/6
25
What is experimental probability?
The probability based on what should happen.
The probability based on what has happened?
26
If I toss a fair coin twice and get TT, what is the probability that tails appears next toss?
2/3
1
0
1/2
27
What is the probability of the set that contains all possible outcomes, P(Ω)?
3/4
0
1
1/2
28
If an event is
impossible
, it has a probability of zero.
True
False
29
What is the theoretical probability that you draw a
red
card from a shuffled deck of cards?
1/4
0
1/13
1/2
30
What is the probability that you draw an
ace
from a well-shuffled deck?
1/4
1/13
1/2
0
31
The area shaded in green is which of these?
None of these.
A ∩ B
A ∪ B
The complement of A
32
What is theoretical probability?
The probability that should happen.
The probability based on what has happened.
33
An event with a probability of 0.1 ...
is very likely to occur.
is not very likely to occur.
is certain to occur.
cannot occur.
