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