720  Average
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Class A - 16 students with the score 50%.
Class B - 4 students with the score 90%.
What is the total average score?



Class A - 16 students with the score 90%.
Class B - 4 students with the score 90%.
What is the total average score?



Class A - 13 students with the score 40%.
Class B - 7 students with the score 60%.
What is the total average score?



Class A - 7 students with the score 90%.
Class B - 3 students with the score 90%.
What is the total average score?



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



Class A - 13 students with the score 80%.
Class B - 7 students with the score 70%.
What is the total average score?



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



Class A - 3 students with the score 70%.
Class B - 7 students with the score 70%.
What is the total average score?



Class A - 15 students with the score 80%.
Class B - 5 students with the score 70%.
What is the total average score?



Class A - 15 students with the score 70%.
Class B - 5 students with the score 40%.
What is the total average score?



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720    58 90 47 90 72 ( 357 )   76.5 64 70 77.5 62.5 ( 350.5 )   [[ 707.5 ]]