Concept explainers
a.
To state if the probability distribution is valid.
a.
Answer to Problem 24SR
The probability distribution is valid.
Explanation of Solution
Given information:
The table shows a class’s grade distribution, where
The probability distribution is valid, because the probability for each grade is greater than
b.
To find the probability that a student shall pass a course.
b.
Answer to Problem 24SR
The probability that a student shall pass the test is
Explanation of Solution
Given information:
The table shows a class’s grade distribution, where
The probability that a student shall pass a course is:
Hence, the probability that a student shall pass the test is
c.
To find the probability that a student chosen at random received a grade of C or better.
c.
Answer to Problem 24SR
The probability that a student received a grade of C or better is
Explanation of Solution
Given information:
The table shows a class’s grade distribution, where
The probability that a student received a grade of C or better is:
Hence, the probability that a student received a grade of C or better is
Chapter 12 Solutions
Algebra 1
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