445  Average
1

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



Class A - 5 students with the score 60%.
Class B - 5 students with the score 40%.
What is the total average score?



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



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



Class A - 8 students with the score 50%.
Class B - 2 students with the score 80%.
What is the total average score?



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



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



Class A - 16 students with the score 50%.
Class B - 4 students with the score 70%.
What is the total average score?



Class A - 8 students with the score 50%.
Class B - 2 students with the score 90%.
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?



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445    40 50 72 50 56 ( 268 )   54 46 54 58 52 ( 264 )   [[ 532 ]]