Concept explainers
a.
Determine the probabilities.
a.
Answer to Problem 23PPS
Explanation of Solution
Given information:
An online poll showed that
Determine the probabilities associated with the number of adults that still own vinyl records by calculating the probabilities distribution.
Calculation:
The probability of
Here
Since
The probability of failure is,
Substitute
Hence, the probability that none of the
Substitute
Hence, the probability that exactly one of the
Substitute
Hence, the probability that exactly
Substitute
Hence, the probability that exactly
Substitute
Hence, the probability that exactly
Substitute
Hence, the probability that exactly
Substitute
Hence, the probability that exactly
Substitute
Hence, the probability that exactly
Substitute
Hence, the probability that all
b.
What is the probability that no less than
b.
Answer to Problem 23PPS
Explanation of Solution
Given information:
An online poll showed that
What is the probability that no less than
Calculation:
Consider the probability that no less than
The number of adults out of 8 random students who own vinyl records could be
From part a, it is clear that,
Hence, the probability that at no less than
Hence, the probability that no less than
c.
How many people should Moe expect to still own vinyl records?
c.
Answer to Problem 23PPS
Explanation of Solution
Given information:
An online poll showed that
How many people should Moe expect to still own vinyl records?
Calculation:
Generally, the mean
Here
For the above situation, it is clear that
Hence, the expected number of adults to own vinyl records is
Chapter 11 Solutions
Glencoe Algebra 2 Student Edition C2014
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