439  Average
1

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Class A - 4 students with the score 60%.
Class B - 6 students with the score 80%.
What is the total average score?



Class A - 7 students with the score 40%.
Class B - 3 students with the score 80%.
What is the total average score?



Class A - 4 students with the score 50%.
Class B - 6 students with the score 60%.
What is the total average score?



Class A - 18 students with the score 40%.
Class B - 2 students with the score 90%.
What is the total average score?



Class A - 3 students with the score 40%.
Class B - 7 students with the score 50%.
What is the total average score?



Class A - 8 students with the score 90%.
Class B - 2 students with the score 40%.
What is the total average score?



Class A - 4 students with the score 50%.
Class B - 6 students with the score 80%.
What is the total average score?



Class A - 12 students with the score 90%.
Class B - 8 students with the score 50%.
What is the total average score?



Class A - 4 students with the score 40%.
Class B - 6 students with the score 60%.
What is the total average score?



Class A - 6 students with the score 80%.
Class B - 4 students with the score 40%.
What is the total average score?



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439    72 52 56 45 47 ( 272 )   80 68 74 52 64 ( 338 )   [[ 610 ]]