290  Average
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Class A - 8 students with the score 80%.
Class B - 2 students with the score 60%.
What is the total average score?



Class A - 14 students with the score 50%.
Class B - 6 students with the score 80%.
What is the total average score?



Class A - 8 students with the score 40%.
Class B - 2 students with the score 70%.
What is the total average score?



Class A - 5 students with the score 50%.
Class B - 5 students with the score 90%.
What is the total average score?



Class A - 17 students with the score 50%.
Class B - 3 students with the score 90%.
What is the total average score?



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



Class A - 8 students with the score 60%.
Class B - 2 students with the score 80%.
What is the total average score?



Class A - 16 students with the score 40%.
Class B - 4 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 50%.
What is the total average score?



Class A - 13 students with the score 90%.
Class B - 7 students with the score 40%.
What is the total average score?



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290    76 59 46 70 56 ( 307 )   68 64 42 82 72.5 ( 328.5 )   [[ 635.5 ]]