The new class mean of the given information in percent = 73%
<h3>What is algebra?</h3>
One of the many branches of mathematics is algebra. Algebra, which is a common thread throughout practically all of mathematics, is broadly defined as the study of mathematical symbols and the rules for manipulating these symbols in formulas.
<h3>According to the information :</h3>
A total of 2160 points would be earned if 30 students obtained an average grade of 72.
= 30 x 72
= 2160
If six students had an average of 78, their total points would be 6 x 78, or 468.
= 6 x 78
= 468
points are the result of adding the points from both groups.
2160 + 468
= 2628
An average of 73 is obtained by dividing 2628 by 36.
It represents a 73% proportion.
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I understand that the question you are looking for is:
In Mrs. Marsh's algebra class, 30 of the 36 students took the Chapter 4 test, and their mean score was $72 \%$. The next day the other six students took the test and their mean score was $78 \%$. What is the new class mean? Express your answer as a percent.
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) so you're going to plug in and then solve to get the inches squared of all the sides that Erin would cover with the contact paper.