SOLUTION: There are 20 students in class X, 40 students in class Y, and 60 students in class Z. If the respective averages of classes X, Y, and Z are 90, 75, 70, what is the average of the t
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-> SOLUTION: There are 20 students in class X, 40 students in class Y, and 60 students in class Z. If the respective averages of classes X, Y, and Z are 90, 75, 70, what is the average of the t
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Question 762256: There are 20 students in class X, 40 students in class Y, and 60 students in class Z. If the respective averages of classes X, Y, and Z are 90, 75, 70, what is the average of the three classes combined? Answer by solver91311(24713) (Show Source):
If the average of a class of students is , then the total score for that class is . You have 3 classes, so their total scores are , , and . You need to divide the sum of those three numbers by the total number of students in the three classes.
John
Egw to Beta kai to Sigma
My calculator said it, I believe it, that settles it
