453  Average
1

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Class A - 2 students with the score 50%.
Class B - 8 students with the score 40%.
What is the total average score?



Class A - 15 students with the score 50%.
Class B - 5 students with the score 60%.
What is the total average score?



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



Class A - 6 students with the score 50%.
Class B - 4 students with the score 70%.
What is the total average score?



Class A - 18 students with the score 50%.
Class B - 2 students with the score 70%.
What is the total average score?



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



Class A - 12 students with the score 60%.
Class B - 8 students with the score 60%.
What is the total average score?



Class A - 16 students with the score 80%.
Class B - 4 students with the score 70%.
What is the total average score?



Class A - 8 students with the score 80%.
Class B - 2 students with the score 70%.
What is the total average score?



Class A - 14 students with the score 90%.
Class B - 6 students with the score 70%.
What is the total average score?



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453    42 52.5 50 58 52 ( 254.5 )   72 60 78 78 84 ( 372 )   [[ 626.5 ]]