SOLUTION: On a certain test, a class with 10 students had an average score of 60 and a class with 15 students had an average score of 80. What was the average score on that test for the 25 s
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Question 714987: On a certain test, a class with 10 students had an average score of 60 and a class with 15 students had an average score of 80. What was the average score on that test for the 25 students? Answer by checkley79(3341) (Show Source):
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