Math Problem Statement
Three Science classes A, B and C take a Life Science test. The average score of students of class A is83. The average score of students class B is 76. The average score of class C is 85. The average score of class A and 8 is 79 and average score of class B and C is 81. Then the average score. Of classes A, B and C is 80 80.5 81 81.5 None of these
Solution
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Math Problem Analysis
Mathematical Concepts
Averages
Weighted Averages
Algebra
Formulas
Average = (Sum of scores) / (Number of students)
Weighted Average formula
Combined Average formula for two groups
Theorems
The theorem of weighted averages when combining groups with different averages
Suitable Grade Level
Grades 9-12
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