
Concept explainers
(a)
To explain: whether the number of students is greater than or less than 20
(a)

Answer to Problem 50E
The number of students is greater than 20.
Explanation of Solution
Given:
Calculation:
Greater than 20. For the first 3 meetings, 2 meetings had less than 20 people. So the other 2 meetings must have more than 20 people in order for the average to be 20.
Conclusion:
The number of students is greater than 20.
(b)
To Estimate: the number of students who attended the fourth meeting.
(b)

Answer to Problem 50E
The number of students attended the fourth meeting is about 24 people.
Explanation of Solution
Calculation:
The number of students attended the fourth meeting is about 24 people.
The first meeting had 2 less than 20 people, the second meeting had 1 more than 20 people, and the third meeting had 3 less than 20 people.
Conclusion:
The number of students attended the fourth meeting is about 24 people.
(c)
To describe: a way used to estimate the part (b).
(c)

Answer to Problem 50E
Part (b) is estimated by finding the average.
Explanation of Solution
Calculation:
Write and solve an equation to check the estimate.
Conclusion:
Part (b) is estimated by finding the average.
Chapter 1 Solutions
BIG IDEAS MATH Integrated Math 1: Student Edition 2016
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