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Chapter 3: Probability Review Flashcards | StudBud
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Chapter 3: Probability Review
Chapter 3: Probability Review
16 terms
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StudBud Administration
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A review of probability concepts from chapter 3.
Flashcards
16 cards
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Practice quiz
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Questions
16
Answers
1
If two events,
A
and
B
are mutually exclusive, then
P(A or B) = P(A) + P(B)
.
True
False
2
Which pairs of events would be considered to be
mutually exclusive
?
A random number, n, is chosen such that n >2 and n is prime.
Blood Types: a type A parent and a type B parent have a type O child.
Parents both have brown eyes and their child has blue eyes.
Sum of 2 dice equals 8 and both dice match.
It's a Friday and it's Thanksgiving Day.
Mr. Nelson is playing dek-hockey and scores a goal (not into his own net).
3
Given an event,
A
, P(
A'
) = P(
A
) - 1
True
False
4
Which set of probabilities shows two events,
A
and
B
, that are
independent
?
P(A) = 0.25 P(A|B) = 0.50
P(A|B) = P(B|A)
P(A) = P(A'|B)
P(A)= 0.05 P(A|B) = 0.05
5
Which formula shows the number of ways to choose
r
objects from a set of
n
objects, when order doesn't matter?
nCr = \frac{n!\left(r!\right)\left(n-r\right)!}{\left(nr\right)!}
nCr = \frac{\left(n-r\right)!}{n!r!}
nCr = \frac{n}{r\left(n-r\right)}
nCr = \frac{n!}{\left(n-r\right)!r!}
6
Which of the following items would not count as an
outcome
in a probability experiment?
the blood types of 3 different people in a search for a compatible donor.
the faces of five dice on the first dice throw in a game of Yahtzee.
A student's selected answer to this question
A starting hand of 7 cards in a game of Uno.
7
1 die is rolled and 3 cards are picked from a standard card deck, without replacement. Which events are
simple
ones?
Rolling a 5 and picking the J, K, Q of Hearts.
Rolling a 1 and picking the 5 of clubs, 8 of diamonds, and two of hearts.
Rolling a 6 and picking three red cards
Rolling a number >5 and picking a numbered heart, spade, and club all > 9.
rolling any number (1-6) and picking 3 cards with matching numbers.
Rolling an even number and picking three Kings.
8
Which term describes probabilities that are based on the results of observations from probability experiments?
Statistical Probability
Improbable probability
Subjective probability
Theoretical probability
9
Which term represents the proper way to state "the probability of
B
, given
A
)?
P(B,A)
BPA
P(B|A)
P(A|B)
10
5 dice are rolled in a Yahtzee game. What is the probability that
at least
two dice won't match each other?
1-\frac{6}{6^5} (or 1-\frac{1}{6^4} when simplified).
\frac{1}{6}
Cannot be determined.
\frac{1}{6!}
11
Given some event,
A
, what does
A'
represent?
the complement of event A
the likelihood of event A
the supplement of event A
a second trial of event A
12
In statistics, an action or trial that produces a specific, measurable result is known as a(n) . . .
probability experiment
simple event
dependent variable
independent variable
13
Which number range describes the possible probability of an event,
A
?
(-1, 1)
(0, 1)
[1, 100]
[0, 1]
14
The
fundamental counting principal
is used to determine the number of ways two or more events can occur in sequence.
False
True
15
A coin is tossed four separate times. What is the probability of the coin coming up tails on all four tosses?
1/2
1/4
1/8
1/16
16
Which formula shows the number of ways that
r
objects can be selected from a group of
n
objects, when the order matters?
nPr = \frac{n!}{r!}
nPr = \frac{n!}{\left(n-r\right)!}
nPr = n!(r!)
nPr = \frac{\left(n-r\right)!}{r!}
