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Probability
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Probability questions for statistics class.
Flashcards
34 cards
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Practice quiz
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Questions
34
Answers
1
Given a bag with 12 red and 7 green marbles, what is the odds of randomly selecting a
red
one?
12/19
1/2
7/12
7/19
2
What is the probability of randomly choosing a vowel (a,e,i,o,u) from the English alphabet?
5/26
1/21
21/26
None of these.
3
The area shaded in green is which of the following?
A ∪ B
The complement of A
None of these.
A ∩ B
4
What is the probability that you draw the
ace of diamonds
from the deck?
1/52
1/13
1/4
0
5
What is the odds of rolling a 7 when you roll one standard die one time?
5/6
1/6
0
3/6
6
You roll a fair six-sided die once. What is the probability of getting an
even number
?
1/6
1/2
1/3
0
7
What is the probability of rolling a number
greater than 4
?
1/3
1
1/2
0
8
The area shaded in green is which of the following?
A ∩ B
None of these.
A ∪ B
The complement of A
9
What is the probability of the empty set, P(∅)?
1
3/4
1/2
0
10
If the probability of an event happening is ¼, then the probability of it not happening is ¾.
False
True
11
The area shaded in green is which of these?
None of these.
A ∪ B
The complement of A
A ∩ B
12
Which of the following experiments does
NOT have equally likely outcomes
?
Choose a letter at random from the word SCHOOL.
Choose a number at random from 1 to 7.
Toss a coin.
13
What is the probability that a number less than 7 will appear when you roll a die one time?
0
1/2
1
1/6
14
Two events are independent if the occurrence of one doesn't affect the probability of the other
True
False
15
What are dependent events?
Events where the probabilities ARE NOT related.
Events where the probabilities ARE related.
16
If an event is
certain to occur
, it has a probability of zero.
True
False
17
What is sample space, S?
The favorable outcomes of an event.
The area where samples are.
The total possible outcomes of an event.
18
If I toss a fair coin twice and get TT, what is the probability that tails appears next toss?
1
2/3
1/2
0
19
What is the symbol for the empty set?
∅
Ω
⊂
∩
20
Two dice are rolled. What is the probability that the sum is 12?
1/12
1/36
1/6
0
21
What is experimental probability?
The probability based on what has happened?
The probability based on what should happen.
22
A women has three sons. What is the probability that her next child will be a girl?
0
1/4
1/8
1/2
23
What is the theoretical probability that you draw a
red
card from a shuffled deck of cards?
1/4
0
1/13
1/2
24
Two coins are tossed. What is the probability of getting two heads, P(HH)?
0
1/2
1/4
1
25
What is the probability that you draw a
diamond
from a well-shuffled deck of cards?
1/13
1/2
1/4
0
26
On a single roll of a standard die, what is the probability that a 3 will NOT appear?
5/6
1/6
3/6
0
27
What is the probability of the set that contains all possible outcomes, P(Ω)?
3/4
0
1
1/2
28
What is the probability that you draw an
ace
from a well-shuffled deck?
1/2
1/4
1/13
0
29
What are independent events?
Events where the probabilities ARE NOT related.
Events where the probabilities ARE related.
30
An event with a probability of 0.1 ...
is not very likely to occur.
is very likely to occur.
is certain to occur.
cannot occur.
31
If I toss a fair coin, what is the probability that tails appears?
None of the these
1
1/2
0
32
If an event is
impossible
, it has a probability of zero.
True
False
33
On a single roll of a standard die, what is the probability that an odd number will appear?
1/6
0
1
3/6
34
What is theoretical probability?
The probability based on what has happened.
The probability that should happen.
