516  Average
1

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Class A - 3 students with the score 60%.
Class B - 7 students with the score 80%.
What is the total average score?



Class A - 7 students with the score 80%.
Class B - 3 students with the score 80%.
What is the total average score?



Class A - 3 students with the score 40%.
Class B - 7 students with the score 60%.
What is the total average score?



Class A - 17 students with the score 80%.
Class B - 3 students with the score 90%.
What is the total average score?



Class A - 3 students with the score 80%.
Class B - 7 students with the score 60%.
What is the total average score?



Class A - 8 students with the score 80%.
Class B - 2 students with the score 40%.
What is the total average score?



Class A - 4 students with the score 90%.
Class B - 6 students with the score 70%.
What is the total average score?



Class A - 18 students with the score 80%.
Class B - 2 students with the score 40%.
What is the total average score?



Class A - 4 students with the score 70%.
Class B - 6 students with the score 70%.
What is the total average score?



Class A - 6 students with the score 60%.
Class B - 4 students with the score 90%.
What is the total average score?



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516    74 80 54 81.5 66 ( 355.5 )   72 78 76 70 72 ( 368 )   [[ 723.5 ]]