A class of 5 students averaged 70% on a given test. A class of 9 students averaged 80% on the same test. What would a class of 4 students have to average on the same test if the overall (weighted) mean was 74.33?
A class of 5 students averaged 70% on a given test. A class of 9 students averaged 80% on the same test. What would a class of 4 students have to average on the same test if the overall (weighted) mean was 74.33?
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter7: Percents
Section: Chapter Questions
Problem 10PTTS
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A class of 5 students averaged 70% on a given test. A class of 9 students averaged 80% on the same test. What would a class of 4 students have to average on the same test if the overall (weighted) mean was 74.33?
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Suppose there are k groups numbered 1, 2, 3, …, k – 1, and k.
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