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