Concept explainers
a.
Determine the probabilities associated with the number of students.
a.
Answer to Problem 21PPS
Explanation of Solution
Given information:
According to a recent survey,
Determine the probability associated with the number of students that own a laptop by calculating the probability distribution.
Calculation:
A survey finds that
Suppose that
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 exactly
Substitute
Hence, the probability that exactly
Substitute
Hence, the probability that all
b.
What is the probability that at least
b.
Answer to Problem 21PPS
Explanation of Solution
Given information:
According to a recent survey,
What is the probability that at least
Calculation:
The number of students out of
From part a, it is clear that,
Hence, the probability that at least
Hence, the probability that at least
c.
How many students should you expect to own a laptop?
c.
Answer to Problem 21PPS
Explanation of Solution
Given information:
According to a recent survey,
How many students should you expect to own a laptop?
Calculation:
Generally, the mean
Here
For the above situation, it is clear that
Hence, the number of students who are expected to own a laptop is
Chapter 11 Solutions
Glencoe Algebra 2 Student Edition C2014
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