Concept explainers
(a)
To find: The probability of the given event.
(a)
Answer to Problem 9WE
The probability for the given event is
Explanation of Solution
Given:
The event is “All come up heads.”
Calculation:
There are a total of
The probability of the given event is as follows.
Therefore, the probability for the given event is
(b)
To find: The probability of the given event.
(b)
Answer to Problem 9WE
The probability for the given event is
Explanation of Solution
Given:
The event is “All come up tails.”
Calculation:
There are a total of 8 possible outcomes for the flip of 3 coins. There is only 1 way for all of them to come up all tails.
The probability of the given event is as follows.
Therefore, the probability for the given event is
(c)
To find: The probability of the given event.
(c)
Answer to Problem 9WE
The probability for the given event is
Explanation of Solution
Given:
The event is “At least one comes up tails.”
Calculation:
There are a total of 8 possible outcomes for the flip of 3 coins. There are 7 ways to get at least 1 tail.
The probability of the given event is as follows.
Therefore, the probability for the given event is
(d)
To find: The probability of the given event.
(d)
Answer to Problem 9WE
The probability for the given event is
Explanation of Solution
Given:
The event is “Exactly two come up heads.”
Calculation:
There are a total of 8 possible outcomes for the flip of 3 coins. There are only 3 ways to get exactly 2 heads.
The probability of the given event is as follows.
Therefore, the probability for the given event is
Chapter 15 Solutions
Algebra and Trigonometry: Structure and Method, Book 2
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