SOLUTION: A class of 24 students have an average test score of 92. A second class averaged 82. If both classes are combined, the average on the test is 88. How many students are in the seco
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Question 787488: A class of 24 students have an average test score of 92. A second class averaged 82. If both classes are combined, the average on the test is 88. How many students are in the second class?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
A class of 24 students have an average test score of 92. A second class averaged 82. If both classes are combined, the average on the test is 88. How many students are in the second class?
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1st class has 24*92 = 2208 points
2nd class has 82x points (x is the # of students in that class)
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The combined classes have 88(24+x) points
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Equation:
2208 + 82x = 88(24+x)
2208 + 82x = 88*24 + 88x
6x = 2208-88*24
6x = 96
x = 16 (# of students in the 2nd class)
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Cheers,
Stan H.
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